1) How many platforms have you used since late March?
For me: Zoom, Whatsapp, Teams, Skype, Google Meet, Facetime, Callme. Possibly Webex and the Facebook one, too. I lose track.
n=7 (9). Do I win the Internet for most? I had barely used any of them before that. Slack is missing, I suppose. About 50% audio only.
2) What do you like best so far?
I like the Zoom interface best, so far. Easiest to use. Teams is quite cranky.