It is not open source, because it does not meet the definition of open source.

I’ve noticed that some “mobility” startups are using Linux. E.g. companies working on electric or automated vehicles.

Perhaps disconnecting the RF antenna, and replacing it with an appropriate termination?

Turn based, or at least have a pause button (in single player).

Yes, but does that still count as “modern”?

I think you mean Tactics Ogre. Although it’s a spinoff of another game called Ogre Battle.

BTW, there is a miniflux package in Debian testing / unstable: https://tracker.debian.org/pkg/miniflux

Maybe each server is hosting a different area in the game, and they are connected by portals. Would need a way to transfer users and their inventory to another server.

I’m also interested, but I haven’t kept up with the project. It sounds nice if data can be shared between apps, rather than each app just managing its own tables in a database.