we got around this by setting up a large group, and having subsets of 3-7 people meeting randomly for 1- and 2-shots. every once in a while there's a 6-session or so mini-campaign to take care of something very significant. sessions are all on VC (but not VTT) to spare everyone the travel time and also allow players from a variety of geolocations. if someone drops from drama, the game survives.

the setup worked well during pandemic lockdown. at least then, everyone had lots of time.