Hardware from the 20th Century is more than enough for 99% of users
Hardware spec outpaced what 99.9% of computer users will ever need at the turn of the century. Just how much compute power do you need to run e-mail, a web-browser, a word-processor and spreadsheet? Okay, so you miss out on being able to spin the Compiz cylinder at 1200 RPM, but other than that, as far as just producing work-product goes, minimal boxes more than mow the grass.
If push came to shove, I could get by with a Pi 3B+ just fine (build times would suffer, but that's just extra coffee).
Don't get me wrong, I'm not against building beast like boxes. I raised 3 kids and have a bone-pile of about 3 of every other year's gotta have Nvidia cards. (yes the 390 and 470 drivers are now a pain to patch with each new kernel version -- but hey, it looks like we will get a free pass with 6.16, no patches seen yet!) And yes, the kids needed the power and graphics power to game with all graphics options turned on. For me, meh, I've got no need. Now that the kids are all grown and out of the house, the bone-pile has quit growing, but looking at the old RTX2070 supers and GTX980s, there is still enough pixel pumping power for anything I'll ever need.
I'd a lot rather make use of older kit, adding a new SSD to replace spinning rust, and take the I/O benefit as that provides a bulk of what the latest and greatest promises as far as responsiveness. With RAM cheap, most old boxes now have 32G (and 64G if their chipsets support it). That's plenty enough to put even large builds on a tmpfs in RAM (e.g. PHP or MongoDB, etc..) which then complete quite quickly, and -- I avoid having to upgrade to a new 750-1000W modular PSU just to support the latest graphics cards.
I guess in sum, this is a testament to the advances made in computing capability over the past 40 years. From the 8080 with a few K of RAM and dual 8" floppy drives that wouldn't hold a single picture taken on your phone today, to Terabyte M.2 drives, processors with more cores than sense, RAM approaching the Terabyte scale and GPUs with more compute power than the system they are attached to. My Tumbleweed laptop powered by an ancient Gen 2 i7 sporting 8G still boots from off to full desktop in just under 12 seconds. Runs all Mozilla apps and libreoffice just fine (as does vscodium, etc..) and will finish most of the large builds I kick off within 30 minutes or so.
For decades I would spec-out the motherboard and chipset wanted, the socket and processor, buy the RAM and graphics card and PSU and put it all in one of Antec's solid cases (and most of those still run!). But today, if I need a box to jut prepare work product, I usually grab an off the shelf refurb HP that meets my needs and costs about $300 US. (many of those are still running too). The custom boxes and the kids custom gaming machines always cost more, but for shuffling documents and occasional builds, literally, just about anything made this century will do. Seems the King Penguin thinks somewhere along those lines too. Good for him. Taking a stand against wasted Watts contributing to global warming and using old kit as long as it meets the need to help prevent us all from drowning in e-waste (most of which is still operational...) That I can respect.