I loved my HP 200LX, and I bought a Planet Gemini as well as a GPD Pocket for the same reasons you described.

But I am also 55, and my eyes can't deal any more with a screen less than 11" in a general-purpose computing device (as opposed to a phone or tablet, which have an OS and GUI designed for the small screens), so my portable devices are now a Chuwi Minibook X and a Thinkpad X13. The Thinkpad is a revelationm as despite its size it is lighter than almost anything else, including an iPad with a Bluetooth keyboard.

I also use a Chuwi Minibook X -- to be frank, it's possibly the best machine I've ever owned in terms of size versus functionality.

It isn't without its flaws: I wouldn't ever use the pre-installed version of Windows (the one that doesn't allow you to open services.msc or Task Manager), because I totally distrust it. The fact that the panel is natively 50hz portrait on an inherently landscape device is painful. The default hysteresis settings on the trackpad are awful, the RAM speed by default is stuck at 4000MT/s...

But after an hour or two of hacking Arch into an acceptable shape and solving all of those niggles, it does absolutely everything I need in a portable machine, and is small enough to fit in a tiny sling bag along with everything else I carry around on the daily. It "only" gets about 6 hours on battery, but that's the biggest downside. And 6 hours is plenty of time to cook.

With a full-screen terminal and a keyboard that is very acceptable for the 10" form-factor, I can hack on anything I want wherever I want. Niri as a WM is an absolute dream on this thing. I basically don't bother carrying around my personal M4 macbook pro anymore, and it has been relegated to sitting on a desk and never moving from home.