What is not acceptable? That apple drops support?
I think there needs to be a differentiation of what is to be expected. Worth it for usage, and worth it due to Apple not supporting it for extended period of time.
Macs are most definitely worth it for long term use. While I no longer use it, my 2012 Retina MBP still works, and depending on a persons needs could be a great computer for them - that's computer is 10 years old. A while back, I tried booting up a 10+ year old windows laptop that I had buried in my closet. It booted, yaay, but it was in no way usable boo.
The other side of the coin is apple dropping support quicker then windows drops support. I'm not bothered by apple dropping support for legacy products and I think by and large (depending on usage), you can live with using an old mac running an older OS. My 10 year old MBP doesn't need to run Ventura. I picked the version that offered the best combination of performance and features. I stopped upgrading that Mac, long before apple dropped support. Likewise my 2015 iMac.