Hardware has by far the least number of uses under the matrix rules, but it's invoked in all kinds of other contexts from lockpicking to repairing items.
Both lockpicking and repairing matrix damage was moved to Engineering in this edition...
Look closer. Quite a few devices require the use of Electronics (Hardware), keycard copiers among them. (also, Bug scanners, a fairly typical piece of gear for runners who don't have a regular decker teammate...)
Fair point about the repairing bricked/formatted devices. However, I was talking about B/R tests. But on re-looking at the rules for them in this edition, the presentation DOES look like they are an expression of the Engineering skill rather than the "Whatever skill the GM says you need" wild west approach to B/R in 5e.
@Price of Cyberjacks vs RCCs:
The most important aspect of either (IMO) is the D/F stats they bring to your Persona. Now, RCCs are generally cheaper, and absolutely don't cost essence. But as already pointed out, they're physically big and that poses problems if you want to smuggle them or be discreet while carrying around a giant R/C controller. Also a problem if you want to do AR hacking while fighting. They don't have rules for what kinds of things require two hands to use, but it strains credibility to argue that you can operate a briefcase-or-typewriter-sized comms device AND still be firing a gun at the same time. So that's kind of a big drawback for Action Jackson deckers.
Furthermore, the RCC's *general* advantage in price is not absolute. Since Cyberjacks are cyberware, they're available in grades. No, that doesn't mean they just get MORE expensive! This is 6we
Used grade is a fragging phenomenally good deal in this edition. So I consider cyberjacks to truly only cost HALF of what the base cost says. (1/2 nuyen price for +10% essence price? I'll take that.) And when you compare RCCs to Cyberjacks at half listed price: RCCs start out with worse D/F stats than where the Cyberjack even begins. Yes, RCCs with stats comparable to the low end Cyberjacks are slightly cheaper now, the nuyen price goes hard in the Cyberjack's favor once you start getting into the 6/5 stat range. AND cyberjacks offer higher D/F stats than RCCs ever do at any price.
@needing Sleaze so you can run your Drones Silent:
Well, I'm not about to argue that there's no value in running a drone silent. But I AM going to argue that failing to run a drone silent means much.
In 5e, the choice to run silent or not was a real double edged sword. I usually opted to just Not. Even as the decker! 1) if you're NOT a decker, you're gonna be seen anyway so why bother. 2) in light of 1, why take the -2 dice. 3) Running silent paradoxically raises suspicions. You don't get a defense against someone making a perception roll asking "is there a silent running icon in my vicinity/inside the host with me?" In the case of riggers, if someone asks "are there drones within 100 meters of me?" the answer (unless you're in the barrens/wilds) is always "duh. About 1d6 hundred drones are currently active within 100 meters of you." Someone has to successfully mark your drone before they can trace its location in order to discover it's someplace it shouldn't be, and THAT you can defend against without needing Sleaze.
So, in 6we the calculus changes somewhat. There's no longer a -2 dice to everything you do while running silent. There's no longer the total giveaway of explicitly only needing 1 hit on an unopposed Matrix Perception test (which anyone with 4 dice can buy that hit) to learn someone's trying to be sneaky nearby. However, in this edition you don't have to "look" for the silent running icon after asking "are there any to look for". One matrix perception test forces every silent running PAN nearby to defend, so you'll have to defend more often. So all these factors tip the scales towards wanting to run silent.
However. One important aspect still is intact, and it's arguably the most important one. Inarguably the most important one, if you're trying to be stealthy: Icons that are running silent are inherently suspicious. There's a risk involved in running silent, as detection WILL raise security awareness. The alternative is to simply NOT run silent, and hide your totally not-supposed-to-be-there drone among the overwhelming noise of millions of other icons a potential observer is also seeing. In order to know your drone is in a place it shouldn't be, they still have to know its physical location and just spotting the matrix signal doesn't give that information away. That information has to be learned via Trace Icon, which means they have to have gained access. Which means they have to have suspected your drone's signal for some reason in the first place. Why are they hacking YOUR drone's signal, when there are surely hundreds, if not thousands, of other drone signals like it? And assuming there is a viable reason for them to do so (not saying there can't be one), you STILL get to defend against that attempt to hack access even w/o a Sleaze attribute or having been running silent.