Good to have you back!
The default setting as far as I know is rendering avatars with a complexity up to 80k. But since people can customize their settings you never truly know, except Firestorm tends to send a message on occasion about how many percent of avatars in a sim has settings that allows them to see you. When I make outfits i TRY to stay under 80k, except when I am in my selfish mood and don't give a damn and want to wear that one awesome but technically absolutely horrendously made mesh hair that shoots my complexity to 300k aaaall on its own
Luckily with these new settings if that gives people problems they can just send me to jellybaby land without me even knowing it. I have noticed a vast difference at huge events when I change my settings to only render people under 20k. I still see some avatars and the rest are jelly babies. It's still a bit more fun than just derendering everybody.