I imagine the young hackers of today just find other things with which to tinker.
I've seen kids build some amazing things in Minecraft. Is this really all that different from modifying the source to a game you copied-by-hand from BYTE magazine?
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.
That sounds flippant, but it's the visceral reaction I have to trying to do everything on iOS (iPads are a little better than iPhone in this regard, but still have the "everything through a keyhole" feeling).
That said, tiny viewports are not really the main problem, since obviously a modern iPhone has far more resolution than almost any monitor available in 1990, or even 2000. It's more that most exploration and creation is not doable on an iPhone, by design.
My original point, though, was that seeing new grad software developers who have never had any non-externally-directed interaction with a computer made me realize why we have to show them how to use the shell in a terminal, and why they seemed to have no particular curiosity about any software thing not directly related to the task that they're doing. For new grads who aren't curious, finding that something they're doing doesn't work due to architectural issues or some nonobvious combination of bugs prompts neither asking for help nor a deep dive into what the problem could be. Asking for help is basically cheating, to them, and they've never before encountered real problems that weren't explained in the text, handled by their group partner, or trivially stack-exchangable (remember, this realization was 2019, and therefore before common LLM usage). At standup after standup, they report making progress on working through the moderately complex ticket they picked up, but in fact, nothing useful is happening. Sometimes people like this can be shown the way, and then become functioning and capable developers and troubleshooters. Sometimes not.
Anyway, /old-man-rant.