That’s simply a matter of numbers. More people = more content, but people can’t seem to get past the fewer content so they don’t join/stay.

I setup miniDLNA once, many years ago and it just kept working. Downside is that I completely forgot how it’s set up.

If the desktop is gnome, you can enable RDP in the settings.

A catch-all email server. I have a limitless amount of mail addresses going to me and my wife’s mailboxes. When an address gets leaked or start receiving spam I immediately know what company is to blame.