CPRed doesn't provide the same thing as Shadowrun- not just in terms of magic/setting, but also lethality. The ease in which characters die is a major turn-off for me for CPRed, since I prefer long-lived campaigns. You can eliminate a lot of that in SR with minimal fudging and competent players, but a lot of the lethality in CPRed seems to come down to luck- maybe that's just my impression from the QSR. It was definitely fun for a one-shot, but it does not meet my own needs as a GM. That's not to say other people can't enjoy that level of lethality- it's also possible that the game isn't as lethal as it seemed, just that the players were inexperienced (Since they were new). But as-is, it seemed like I would have to fudge or house-rule a lot of CPRed to get to the right level of lethality, and that feels like cheating. I'm not morally opposed to fudging dice, but I want to avoid it as much as possible, and I don't want it obvious to the players when I do so.
Interestingly, CPR is supposed to be much less lethal than old CP2020. Haven't played CPR, but I did play 2020 back in the day and character permanence felt on par with Call of Cthulhu. LOL! CPR is just one option, though.
You can also play prior editions of SR, which hit everything most players of SR6 re looking for without the same issues. This seems to be the most popular option. I run an SR5 game and play in an SR4 game. No real reason to update either to SR6 given the current state of the game. That's coming from someone who gets twitchy just thinking about retrogaming (the SR4 game is difficult on me, but the company at the table is great).
Leaving the friendly confines of CGL, Blades in the Dark is an amazing basis for a Shadowrun game. Fate can give you everything you want, too. Android lacks magic, but it's a really good cyberpunk setting and game - FFG pays attention to details.
We don't really need to stop at cyberpunk, either. As our interest in SR6 plummeted, my friends didn't fall back on more SR5. I just started running a D&D game and I'm pretty excited about that. We have Star Wars, Fate, and Shadows of Esteren games that are a bit irregular, but they're getting more attention. I'm thinking about a Battletech game.
Put another way: why invest time in a dumpster fire? The core rules for SR6 are so bad that we don't want to put time into fixing it, let alone playing it, and that dumpster fire is going to burn for the next five years. Why not walk away and come back in 2024?