LOL. No. That's a comically inaccurate take. I've never seen a router run on a PowerPC chip. Just because Motorola made routers and the PowerPC chip doesn't mean they're the same thing. A company can have wildly-varying product lines.
That's probably just because the only routers you've seen are the ones on the shelves at Best Buy and such. Most of Motorola's G3 and G4 sales were to companies like Nortel and Ericsson and Cisco, not Apple. It was such a disparity that Motorola actually thought that Altivec was a waste of silicon until some of its developers ported the IP stack to use Altivec, since their customers didn't much care about vector computing, since they didn't need it.
PowerPC was a joint effort between Apple, IBM, and Motorola... the "AIM Alliance." Initially it went pretty well. Eventually, things went sour when no one really could create a unified desktop/server operating system that was compelling. Since no one was buying PReP machines, Apple was really the only desktop/server customer for those chips. They were also used in a LOT of game consoles... PS3, Xbox 360, GameCube, Wii...
I'm well aware of that. It did well initially because the 68K series was getting long in the tooth, and the market for personal computing was wide open. Yes, Apple was the only company using them in computers... but small potatoes next to the likes of Nortel.
That G5 was also not "obsolete within months"... those machines were supported with OS updates and software for years after the transition.
The G5 had already been lapped by x86 by the time it launched. IBM announced at ISSCC around three months after starting to ship it that it was shifting its focus for the PowerPC platform to embedded, because it couldn't compete with x86.
The Apple Silicon transition is a completely different ball of wax. Apple's in control of the design of the chips (and has that ability now, they didn't back in the PowerPC days) and is just outsourcing the manufacturing.
You finally started to make sense. I suspect that part of why Apple has been dragging its feet as far as keeping up with x86 progress has been due to putting its effort into its own processors. Even Intel is ahead of where Apple is currently, so it's not like Apple's computer mediocrity is entirely on Intel, because Apple has been for several years very slow to adopt Intel's latest, and we all know how thoroughly AMD is trouncing Intel lately.
While I'm a little skeptical they can scale the A-series chips to compete with the big iron in top-end iMacs, iMac Pros, and Mac Pros in a short timeframe I wouldn't take any insight on this transition from the AIM/PowerPC world. Entirely different.
During the PPC era, the mac was a miniscule seller, and frankly no one cared about it except Apple and its die hard fans. That miniscule sales volume definitely lead to a castoff mentality, but no one in their right mind was going to make a processor specifically FOR Apple; the return on investment was a non-existent. The enormous volume of iDevice sales changes that, because even though computers now comprise a relatively small portion of Apple's sales, its volume of iDevice sales give it access to enough economies of scale to make its own design viable... even if it dropped its computer line entirely, not that I expect that in the near future, unless its computer sales tank due to the switch, which I'd give even odds to at this point. And might even be part of the plan to replace its entire laptop line with various flavors of iPads, since all it would need at this stage is an OS update to address the file system limitations, and an extra TB3 port or two with eGPU support.