I’ll be downvoted to hell for saying this. But in this event I think it’s better for you to upgrade to Win 11 or maybe even move to MacOS (mac mini is pretty cheap), though I don’t know if you’ll find your replacement apps.
I use Win for work (no choice there) and Ubuntu at home (just browse the net, and only browser applications).
I mean he’s legally obligated to, not really a choice. He can say screw it, but then he opens himself up to legal troubles.