Headless server with debian and mldonkey, I search on ed2k/kad network and public trackers for bittorrent. I use plex to stream to my devices.

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

eMule works just fine nowadays with fiber connections.