Given Apple’s current locked-down trajectory with the Mac, the Mac Pro was gonna die eventually, and it’s for the best that it does given it was reduced to little more than a massively overpriced Mac Studio grafted onto a useless PCIe backplane; a $12k grift, basically.
PCs at least are still modular and expandable; for now.
Being the “low cost Mac” is very different from being the cheapest option.
Though I’ll say that my one Mac purchase in the early 00’s was a few years after they switched to OSX and I bought a Macbook Pro for probably 60%+ more than the equivalent PC but it lasted me over 2X as long as any PC ever had prior. Plus the free OS upgrades that were unheard of on Windows machines at the time.