No surprises here. Just like the lockdown on iPhone screen and part replacements, Macbooks suffer from the same Apple’s anti-repair and anti-consumer bullshit. Battery glued, ssd soldered in and can’t even swap parts with other official parts. 6000$ laptop and you don’t even own it.
On Intel Macs, Linux is pretty easy to install. A lot of people put a lot of work into having most Macs just work out of the box on Linux.
On Apple Silicon, most of that work is still unfinished. Asahi Linux is the main project to get Linux on M1/M2, and the goal is to upstream everything, but it’s a long road.
Either way, the sheer popularity of Macs basically guarantees a usable experience on Linux. It’s just going to take a bit for Apple Silicon to catch up.
Also, I think “last forever” with Macs is more about the hardware itself. It’s hard to deny the build quality is really good (except the keyboard from 2016-2020 on MBPs), and I’ve seen people using 2011 MBAs stuck on Catalina as their daily drivers because the hardware just keeps working.