bring back forums
you aren't supposed to have a single identity online
communities shouldn't demand you let a vc-funded company have your mobile phone number
you don't have to pay $100/yr [or whatever it is] for features that every forum had for years, or if it didn't it's for a reason
your group of friends or multiple-thousand-people community won't disappear because of the failure of the aforementioned vc-funded company
even if the group dissolves you will still be able to find the useful tips you used to share