I'm a computer nerd who started on DOS on IIRC a 286, all the Windowses (OK not quite all, though my first job did expose me to a couple NT versions and 2K in addition to nearly-all the home versions I upgraded through on my own) and various Linuces (Gentoo as my primary OS, even, for like... five years, LOL)
These days there are two things I use my "real" non-server computers for in my personal life:
1) Media piracy, only because I've been too lazy to set up a headless torrent system on my media server w/ VPN connection (why does the media server exist? Again, purely for piracy, remove that use case and it'd be gone as a waste of electricity and space the very next day). I could fix this in a Saturday and remove this entire use case, improving my process significantly at the same time, just haven't yet.
2) Video games. Really hoping that new Steam console doesn't end up being sky-high expensive, because I'm excited about "consolizing" this use case and ditching my last "real" PC tower (other than one server that I go months and months without directly messing-with; and that "real" PC tower is already running Bazzite to make it Steamdeck-like, it's just janky as fuck because it's Linux on frankensteined hardware so of course it's janky as fuck, so I'm still eager to swap it for something designed and with support for that actual use case).
Everything actually-important happens on iOS, and usually on a phone.
In my personal life, I've concluded that I just have no idea what more-useful-than-the-time-it-takes stuff I'd even do with a "real" computer, despite spending absolute fuckloads of my time screwing around with them from ages like 7-30. What I learned in that time was "how to computer" to a pretty advanced level, and luckily that per se has paid the bills and then some, but in all that time the actually-directly-useful-to-me stuff I've done with it has amounted to very little.
To me, personally, I've realized PCs are a solution looking for a problem, and that so rarely does my trying to bridge that gap result in an actual net-benefit (usually, not even close) that I've mostly stopped trying. That impulse got me where I am, can't complain, that "wasted" time over literal decades gained me a bunch of skills that are (it turns out) almost entirely useless to me personally but that others are willing to pay for, great, but I find myself a computer nerd who doesn't actually know WTF to do with a "real" computer. I just use my damn phone.
I suppose I'd still find them a lot more useful if iPads and iPhones didn't exist and so I needed to do banking and reading and such on some other computery device, but those do exist, so... yeah, not a lot of motivation to even own a "real" PC anymore, to include a MacBook—I doubt I'll replace my M1 Air when it finally dies.
To sum up, as a lifelong computer dork, I don't even know why I need a "real" computer any more, let alone why anyone else does.