Perfectly alive with aprox 100k daily users

I compile the source code: git clone, cd mldonkey, ./configure, make, make install

You still have realvnc lite. It is free, 1 user, 3 machines, less features, but the basics still there.

You could use i2p for torrent it is free and secure, but slow

It's just Germany, the rest of Europe (EU and non-EU) doesn't actively care about them unless it's cp.

It's still my favorite network (using it from more 20 years ago), but for the latest things I use bittorrent and seed to both networks (bittorrent and ed2k/kad) through mldonkey 24/7.

Well you could run these services in your server (only if you have enough spare bandwidth, ram and cpu) to help the comunity to circumvent censorship in some countries, like Russia or Iran. Here you have more information for tor and i2pd.

Tor relay (guard/middle or bridge/snowflake) and i2p node (i2p, i2p+ or i2pd)

You could seed on ed2k/kad networks, just share the folder

Then samsung galaxy a35.

Samsung phones nowadays are one of the best software support on every budget, starting with the A15 4G (~150€) with 5 years to the flagship, S24 ultra with 7 years.

Samsung galaxy A15 5G, Cheap phone (~180$), micro-sd, headphone jack, good software support (4 OS updates, 5 years security updates), good battery, 1080p amoled 90Hz 800 nits.