Personally, my ISP (T-Mobile 5G) has CGNAT and blocks all incoming traffic. I can't simply Wireguard into my network. Tailscale has been my intermediary to get remote access.
I guess it's time to figure how how to host an alternative on a VPS (I see Headscale mentioned in these comments).
I really like Audiobookshelf for audiobooks.
But it breaks my brain that it still hasn't implemented some sort of automatic queueing of new podcast episodes. Every time you finish a podcast episode, you need to manually go into the app and find the next episode to play. Not ideal for when you're driving...