I mean netcode for pc-to-pc games at least isn’t really rocket science. I’m not as familiar with the crossplay aspect, but I’d hazard a guess that it is only difficult because console manufacturers have locked multiplayer networking behind their own subscription services. I can understand why they went the route they did, but maybe crossplay is overvalued if the cost is stuff like this.
Shoot Mycroft got shut down? I remember looking into it a bit ago and filing that away as a future project, rip. I know Homeassistant also has one now too