I wouldn’t want to do a tech critique of the system in a public forum, and I’m probably not qualified to do so. I’ll make a few non-technical observations:
Quantity (not quality!) of online discussion (there is an ADRIFT forum, too)
Amount of active technical development
Footprint/Mindshare
It seems like at least one highly visible reviewer has trouble with an ADRIFT game during larger events
Availability of source code/extensions
That’s not to say people don’t make good ADRIFT games–they do! You could be one of them. Try a room in ADRIFT too, if you like. You might prefer it.