YT ads can be relevant to you based on data collected about you
They certainly can be but if there are 2 advertisers and one is the most relevant and the other pays them more money, which one do you think Google is going to show you?
The one that pays more because it’s an auction, but an advertiser that pays more for a less relevant ad to a user won’t be making as much money so there is an incentive to be more relevant.
Its not difficult for technical people like you or me, but my friend who just wants to watch their favorite show on my Plex on their TV won’t know how to traffic engineer the traffic over a Tailscale network to my network. My mom won’t be installing Tailscale on her laptop and phone.
With Plex, you’re getting the easy ability to grant access to users. You get a single pane that can search across multiple Plex instances, and NAT traversal/port forwarding. Jellyfin makes you figure that out yourself.
Sad, but very true in my experience. I find even my friends who work in software engineering and have exposure to the bad sides of what technology can do, just don’t take any efforts to change. They addicted to Instagram, to Amazon, and everything else.