I'm guessing this isn't what you meant, but the endgame of "Apple, please make things hard for developers" is there's no apps left for you to use that aren't made by Apple, because they made it too hard for developers.
A balance has to be struck somewhere. Developers increasingly do not like where Apple is placing the balance (generally on the side of 'go screw yourself, time to rework your app for our latest guideline and API changes, also buy some new hardware to run the latest xcode')
Xcode has generally supported the two newest macOS releases, with its current minimum OS being Mojave, which supports Macs from 2012 and if you pick up a $50 GPU upgrade, even 2010 Mac Pro’s. Almost all of those same Macs will be supported when Catalina becomes the new minimum.
This doesn’t seem all that onerous. If you’re stuck on a Mac that’s a decade old for some reason all it’ll take to be able to develop again is picking up a $150-$200 Mac mini or iMac on eBay/Craigslist.
A balance has to be struck somewhere. Developers increasingly do not like where Apple is placing the balance (generally on the side of 'go screw yourself, time to rework your app for our latest guideline and API changes, also buy some new hardware to run the latest xcode')