Just got a Pi1B. What can you actually do with it these days?

As the subject header would imply, this morning I got a Raspberry Pi 1
model B from eBay. I was initially tempted to futz around with Slackware
ARM on it, but that distro last supported the Pi 1 in version 14.2,
while the latest stable, 15.0, doesn't support it.

Raspberry Pi OS was right out since I recently saw its performance in
the modern day in a recent Jeff Geerling video on YT.

So I went with the best possible choice for a fast and reliable OS on
such old hardware: NetBSD.
So far, things have been pretty decent, especially in the TTY. In X11
there's not a whole lot I can run at once, but it's OK for light
websites (as in, SUPER-light - even SearXNG will crash most browsers I
try).

But aside from super light work, what can I actually do with this thing?
I doubt emulation's much of an option, and I remember seeing one of
these running Quake, so that might be worthwhile to get working.

If you can think of any productive use-cases for an original Pi model B
(not even the B+) let me know, and I'll consider it :-)