Note that Tuwunel maintainers are banned from the Matrix foundation and have openly threatened Continuwuity developers.

Visible on Voyager by tapping the image

overall we need something to text

pretty much Matrix’s entire point

(plus send files)

also implemented in pretty much every server and client; I think even Element can send files

call

look into e.g. #matrixrtc:continuwuity.org — sable requires a setting to show the call button in non-DM rooms

video/screen share

unfortunately this is the only thing I’m not confident is supported

bonus for emojis, stickers

should be available with any im.ponies-compatible client such as sable

Not telemetry? Continuwuity just uses it to post release announcements to the admin room; I think there’s a way to disable it if you prefer.

.moe already exists; my Matrix client has a .moe domain.