Pretty sure Google has used Docs internally since long before COVID.
"used Docs internally" is not the same as:
> on normal consumer internet connections
Oh yeah. One of my pet peeves is that every comms product from Google (say Google Meet) works poorly on a slow internet connection, and slow could be something not bad at all, say 20 Mbps. Zoom, the former Skype, Slack Huddles, Go2Meeting, absolutely every other product has good audio quality and tolerable video quality. With Google products there are dropouts every few seconds so you can't understand what the other people are saying.
I have used Google meet exclusively for a number of years, multiple times a day on the cheapest Internet connection I can buy in my area. It is consistently a better experience then Zoom or Teams.
The only caveat is that the experience is not good on Firefox. Google meet is the only thing I use Chrome/Brave for.