SimpleX

Like person of interest?

LMDE or Elementary OS

Also Simplex.chat

You can host Simplex server and clients

Use BSD/Linux/Ironclad/SmartOS etc etc Open source Operating systems for

Also many Gamers on GhostBSD , NetBSD (mostly retrogames), OpenBSD

Well for one PlayStation OS uses FreeBSD and BSDs might be better suitable for Anti cheat DRM stuff game companies want.

They might go in direction of BSDs.

Agreed

https://docs.freebsd.org/en/books/handbook/wayland/

Made out of Empty cups

Meanwhile non SystemD systems like NetBSD FreeBSD OpenBSD are safer.

Also Simplex but I find element client very comfortable to use.