[dspillett]

There are very similar things available. https://store.planetcom.co.uk/collections/popular-items/prod... is basically mimicking the Psion 5 in its physical design, and there are a number of other very small laptops around like https://www.amazon.co.uk/dp/B09FQ7QNFB/ or GPD's various models if you want higher specs and have the cash to flash, and so on.

But for longer messaging on the move (and occasionally other things like SSH for emergency admin) I find a small external keyboard (bluetooth or USB) and stand for my phone does the trick. You can also get keyboards with built-in stands (or cases with built-in keyboards) so you could use them while standing, though that isn't what I currently have. This has the advantage of not needing a second full device (my main phone is always with me) and not always having the extra size/weight of the keyboard in your pocket (as you would if you use a device with a full keyboard as your primary comms unit). Whether such an arrangement would be similarly optimal for you depends on how often you would actually need it: while having the keyboard for long messages and other writing is really nice when I do use it, it is fairly rare that I can't just wait until I've got a laptop or PC in front of me.

[regularfry]

I find as I get older and my eyesight isn't quite as good that what I want for that sort of use case is an external keyboard and a monocle, or some other head-mounted display. Any portable device with a stand that's any smaller than a laptop means leaning over and squinting.

[worldsayshi]

Regarding head mounted display - I've been wanting to try something like NReal Air Ar glasses. Sounds like it fits your description:

https://www.reddit.com/r/digitalnomad/comments/y155e1/my_nom...

[regularfry]

Hm. They look very interesting. Wonder if there's anywhere I could try them out. I wear glasses for mild astigmatism, and I've always wondered if that's a blocker. For things like https://brilliant.xyz/ that's obviously less of an issue, but also they aren't aiming at the same sort of display.

[regularfry]

Oh now that's even more interesting. Apparently they include a normal frame behind the display, so you can have your optician fit prescription lenses.

They're in a reasonable price range, too. Looking better and better. Thanks for the suggestion!

[jorvi]

A foldable might help in that departement, but you definitely sacrifice pocketability.