Movim actually predates the creation of ActivityPub (and its precursor protocols) and back then XMPP was the popular choice, even Twitter experimented with running their service on an XMPP backend. But despite its age, Movim has kept up with the times quite well (as did XMPP in general).

https://mov.im/ or another instance from https://join.movim.eu/

Runs the https://movim.eu/ open-source software.

Federates via XMPP.

https://write.as/

Which runs this open-source software: https://writefreely.org/

Federates via ActivityPub.

Have you consider using a note taking app with server sync instead of abusing a chat service for the same thing?

Pcie slots also allow adding more nvme ssd drives, although sadly most mainboards do not support pcie bifurcation, so you will be limited to a single nvme ssd per slot.

Up to RPi4 the power efficiency was a lot better, but performance wise you really struggled due to lack of options to connect faster storage. With the RPi5 becoming more power hungry (but also more performant) it is less clear cut, and price wise a refurbished x86 pc isn’t really more expensive either.

All in all I would say the benefits of using standard x86 outweigh the slightly higher power use these days. RPis are still good if you need the specific hardware GPIO etc. that is has though. But for self-hosting go for x86 and be mindful of peak loads (these CPUs become much more power hungry on higher clock-speeds, especially turbo-boost).

Look of a refurbished thinclient with a 6th or 7th gen Intel CPU with the “T” at the end (for example i5 6500T). Those are basically power optimized mobile CPUs for desktop PCs. Those are currently best value for money IMHO.

Alternatively use an old laptop, which is great for beginners, but storage extension will be very limited.

If all you want is Nextcloud, you are probably better off getting a managed service like this: https://www.hetzner.com/storage/storage-share/

Cockpit is a simpler choice for that.

Probably the taste of dissolved gasses differs. Normally that is the main difference in taste between water of different temperatures thus we take it as a taste proxy for temperature.

For you to understand: when you say “keep politics out of tech” that is an explicit political position and you are basically saying “politics for me, but not for you”. Or to put it in different terms: unspoken support for the status quo, is a deeply reactionary political position and you are trying to enforce this by “keeping politics out of tech”.

Nothing specifically, just nice improvements cumulating over the years.

Installing Linux on most hardware became really easy maybe 5 years ago.

Gnome works quite well on a larger touch-screen. Edit: ah, Ubuntu should have that by default.

There is a special .iso archive for all past releases.

Systemd is very useful for managing (rootless) Podman containers.

Minetest with mods & SuperTuxKart

https://www.davidrevoy.com/article1004/xppen-artist-pro-16-gen-2-review-on-gnulinux

Edit: ah, I should read the OP 🤦‍♂️

Storage expansion options are the one thing mini-pcs are bad for, so not really any great options there.

You could get a m2 to SATA adapter board, but getting the additional drives powered if you don’t have a ATX PSU isn’t fun.

And yes, use USB only for rarely accessed data.

The point is rather that RISC-V is only open-specifications and most available chip designs are not open-source or only partially so in the open-hardware sense.

No one would claim that the Ethernet specifications are open-hardware, yet you see the same (false) claim for RISC-V all the time.