Doing this more than a decade? Didn't see any brokenness to be honest.
> Wanna use your 7 year old Mac to browse the web? Oh wait you can't because the os blocks it.
Nope. My 2014 MBP is a happy camper and use it daily at home. No blocks whatsoever.
> Linux on desktop has been ready for years now, it absolutely shreds apple and microsofts offerings
That's true though. Laptop power management is not there yet, but I prefer Linux over anything else for the last ~15 years or so. I use Mac laptops because I like the hardware and see where another UNIX based OS is.
> Mac on the other hand is an absolute nightmare to administer for clients. Same with their phones.
I think Apple phones are relatively easy to mass-manage via Apple Configurator, but MDM is a totally different story in macOS. Glad that my machines are not managed.