I haven't personally owned any 32-bit hardware for a little over a decade at this point, but it burns my ass that support's dropping all over the place. Plain old i686, PAE-enabled CPU with RAM that goes beyond 4GB? It's still perfectly capable! Hell, probably more capable than many modern low-end 64-bit chips.
I am allergic to throwing stuff away, and I lub my Thinkpad T60, but they can't really compare on performance. A modern N150, even a Pentium Silver from a couple years back, is going to
rape any of the last hot shit 32-bit only chips that I have in it, or indeed one of the early 64-bit Core2 Duos that that Thinkpad could be upgraded to.
https://www.cpubenchmark.net/compar...Intel-Duo-T2700-vs-Intel-Pentium-Silver-N5030
Which is not to say it can't be useful. The CPUs are still fine for many things, the problem is the memory- and that PAE limit isn't the real one on any regular consumer hardware.... even with a Core2 Duo with AMD64 you can only run with a little over 3GB on that era of ThinkPad. And I have no interest in heating my home with a 15 year old pre-64 bit Xeon.
Your example doesn't really ring in my head as "minimalist." A constrained system with 4GB RAM and a 64-bit processor is still capable of far more than you give credit for. LXQt exists, and you also have window managers that are basically miniature desktop environments unto themselves like Fluxbox and Openbox. You don't need to strip all the way down to dwm, coasting off <25MB for your initial graphical session on such hardware; that's just sheer lunacy. They're nowhere near as "sexy" as something like Hyprland or i3, they're nowhere near as minimal as dwm, but Fluxbox wins by having a taskbar and right-click to look for all your programs. Openbox wins by being endlessly customisable and still looking cool in the process. Both *box window managers are fairly bloated by window manager standards... but they're still heaps faster than even the most minimal version of Xfce4 you can get away with running.
My point is that there's 'minimalist' and 'minimalist'. I mean, when I first used Linux, it was on a 486 that had 8mb of RAM (might have upgraded to 12mb at some point) and that ran X11 with WindowMaker and some graphical apps just fine (of course, it could also run Windows 95 and launch into games of Age of Empires if you weren't worried about it crashing after several minutes).
You can use a modernish laptop, which will be 64-bit, with 4GB of RAM, in a normal use case like browsing the web with multiple tabs (where my T60 is going to be taxed loading up one tab of XenForo). But in that circumstance the big issue for the 'modern' but memory underprovisioned machine is going to be running out of memory. That's where saving a hundred or so megs actually makes sense to me.
By comparison my T60, even restricted to 3GB of RAM, would never run out of memory web browsing, because it'd be unusable first just from the background load from any five webpages that aren't in the 'Professor Doctor' style. And using a few terminal emulators, some normal GUI apps (not Electron obv), I'd never get close to exhausting the memory available. So why not rice it up a bit.