I suppose we could resolve it like this- normal users can connect instantaneously, but hacking in 2080 relies on sensitive covert timing channels.
I have an answer for this.
Edit to add - in my own, homebrew, non-canonical fluff.I split the Matrix into two: first, a "local mesh" of peer-to-peer mesh-networked nodes, with a range of 1/2km or so but with noticeable signal degradation across that range. Then an "upper grid" or "backbone" of superfast fibre/other sci-fi gunk. The two are linked by "uplink nodes" (aka "beanstalks".)
Traffic hops from device to device around the local mesh, mostly constrained to very short range (only barely better than line of sight.) It's high bandwidth, high frequency wireless. If the traffic is headed to somewhere outside of local mesh range, it goes to an uplink node, where it is swept up onto the backbone. On the backbone, bandwidth is functionally infinite, and you can communicate with anything.
The uplink nodes are high-rating hosts that are very well patrolled by GOD. The backbone is routinely and exhaustively traffic-snooped by GOD and its pet semi-sapient AIs. It's very, very difficult to sneak any hacking traffic on there (in game terms, you get huge Overwatch Score every second.)
But the local mesh is the wild west; a huge, messy soup of devices running different protocols and software versions and each with their own forest of vulnerabilities. This is where hackers can do their thing, but only when they are within local mesh range of their target. And they are disrupted by eg. wireless blocking paint.
Hosts are in two types too. Cloud hosts are attached to the backbone, and are therefore close to impregnable; not only do they have their own defences, but the backbone itself protects them. But the latency is too great to form WANs with cloud hosts. So there are also local hosts, which operate entirely in the context of the local mesh. These are your things that run security for a facility, the R&D terminals, local secure file storage, etc. These are shadowrunner's targets.
In addition, the corps do not 100% trust GOD. They worry that some demiGOD from a different corp will use the traffic inspection to steal their secrets. So there's an entire underground world of hidden local hosts, data couriers with chips in their head, anonymous people with briefcases full of chips, dark fibre links between sites -- all to shuttle around secrets away from the prying eyes of GOD. And all of them vulnerable to our beloved shadowrunners.
I understand that resolving this with real-word internet is futile, but it is certainly fun
I think so too. That's why I've been writing my attempt at the fluff!