I like your spirit, but I don’t think a Chinese equivalent to Google Play Services would be more desirable

I find the Jellyfin webapp a pretty bad experience on mobile, compared to FinDroid.

I really like the webapp on my LG webOS TV (especially good with the Magic Remote) though.

So I guess it kind of depends on the platform.

I actually use both apps, I find Organic Maps a lot nicer for looking at a map and navigating by foot or bike, and Magic Earth seems to pick more sensible car routes some times. Also the live traffic data makes it more fitting for car navigation (Organic Maps doesn’t have traffic data).

Jellyfin did some work on integrating the Skip Intros plugin a lot better, AFAIK you just have to enable it once on your server and then once in the settings of all Jellyfin web players.

As for apps, there are some good native third party apps which I mentioned here.

Was this with the first party Jellyfin app or with Swiftfin?

If it was with the first party app, I’d definitely recommend giving Swiftfin a try.

Jellyfin has native apps for Android, Android TV and iOS.

Does Plex offer native apps (that aren’t just stripped down browsers) for more platforms?

I can highly recommend Magic Earth as a Google Maps alternative (also available for Android). It uses OSM data and has some traffic info. It’s not as good as Google, but it’s the closest I’ve found so far.

AFAIK you can enable the snapcast server and then use an app like SnapCast to stream to your mobile devices.

I also use Posteo, one thing to note though is that Posteo doesn’t (and probably won’t any time soon) support custom domains. If that doesn’t bother you, it’s a great choice.

The other alternative I found during my research, which doesn’t have that limitation, is mailbox.org.

That’s incorrect, Graphene OS has Android Auto support.

If you have to access wikis from fandom, you can use breezewiki