Could you link to the Lemmy style app please, I haven’t heard of this before

You can install alternative android distros on an android phone that will keep updating long after the manufacturer has stopped. For example lineage OS which supports lots of devices (but not all).

There are also Linux distros targeted to mobile devices.

You just need to pick a device that is supported when buying.

Discourse and Lemmy are both based around topics/communities so hopefully there will be better federation here. E.g. being able to follow a discourse topic from lemmy would be really cool.

Hopefully they have done this in a way where Lemmy can federate with then easily.

We can already view mastodon threads that are linear inside Lemmy.

Oh, sorry. It wasn’t for me earlier (I linked through from Firefox suggestions)