I'm in my late 40s now, and have been using computers for nearly 40 years (yeah, one of those kids.) Installed Linux on my 386 from floppies, and now in my day-to-day I write C# and maintain the linux servers where the .NET Core business application lives.

I've set up bouncers, ran my own email for years, and at some point I just became immensely bored of doing those things. There's an ungratifying sameness to having to fiddle with self-hosted email or hunt down why my irc bouncer crashed/went offline. This kind of friction extends up and down the stack, too, which irc client works on my phone? There are a few I might choose from, do I spend time trying them out over a period of days to see which is a decent one? Oh, well I still don't have threads, even if one client or another will auto-preview image URLs. And on and on.

I am disinterested, as you say, not because I don't want to learn it, but because I have.