[gambiting]

How? I'm still using a Late 2008 MacBook Pro with Catalina and it runs absolutely fine for browsing and programming, and your 2015 model is running slow?

Also, that sounds like a bug not forced obsolescence, apple just doesn't allow new MacOSes to be installed on hardware old enough unless you hack around it.

[corytheboyd]

Running a 2012 MacBook Pro, also still works just fine for development. The screen suffers burn-in very easily now but it’s not a big enough distraction to upgrade :P

[leptons]

Apple switched to ARM CPUs. Your 2008 MBP now has an expiration date, where it will not be capable of any more OS updates after a certain date. All Intel Macs will not be supported after a certain date. We don't know what date that is yet, but it is coming.

[gambiting]

It already didn't get any "official" updates for years now but there is a community porting latest versions of MacOS to it, that's how I'm running Catalina. Besides, even with the ARM chips coming, it doesn't look like Intel macs will disappear straight away, x86-compatible MacOS will be around for years and years, if no for any other reason than that currently sold Intel macs will still be getting updates. And besides, it's a 2008 machine - if I only get a couple more years out of it then that's still great.