Corsome

Only as a last resort when no alternative is available. Fortunately this is rare since we've got plenty of options available.

I'm using both and they are very similar. The free jitsi service shouldn't be really used in a comparison as self hosted works miles better (at least in my experience).

    while(true) {
     switch(*ip) {
      //arithmetics (+,-,*...):
      case PLUS: ds.push(ds.pop() + ds.pop()); ++ip;
      //stack manipulation (drop,swap,rot...):
      case DROP: ds.pop(); ++ip;
    ...

Hmm... shouldn't each case contain a break? It doesn't seem like a fall through is a good idea here.

Dino.im crashes too frequently for my tastes. It also doesn't have an official Windows version. Gajim looks outdated and the update procedure broke several times (I know the authors are working hard to modernize it though).

iOS story is sad. Family used Snikket (thanks for your work on it) but it still dropped notifications even after following with issues and Prosody modules needed. (Monal seems to be okayish now).

Even Conversations.im seems stuck. I know everyone has their favorite missing feature but for me no reactions is the biggest.

    proc echoLine(): void = discard

Discard looks cool! I'm Rust I had to use the unimpl macro crate [0] to get sane error messages. It would be good if that was build in though.

[0]: https://crates.io/crates/unimpl

Matrix has well maintained clients and the overall experience is smooth especially for non technical people.

Source: I use XMPP and Matrix daily.

Do you use Conduit daily yourself? I'm wondering if it's stable for daily use.

Agreed with most of the points raised here although reproducible images are currently hard to achieve due to technical reasons on how docker builder operates. See https://medium.com/nttlabs/bit-for-bit-reproducible-builds-w...

Is it really a one man show? It looks like Beef Lang has excellent home page https://www.beeflang.org/ and I never heard about it until now.