I still use them if I am the one who is sick to prevent spreading, or if I'm going to be going on a trip soon to prevent me being sick and ruining the vacation, or if I'm around vulnerable people. The vacation one might sound silly, but I had a very close call this year where a family trip that couldn't be canceled and had to be planned a year in advance was almost ruined by everyone getting sick a few days before. We lucked out and it was very mild, but it could have been something nasty that made us cancel the trip. So now I wear a mask when going out in public a couple weeks before a trip.