On top of meetups evaporating, the big issue is post-COVID meetups meeting 3 nights/week nearly impossible. I have 3 or 4 meetups I try to regularly go to and I'm lucky if they are run monthly.

I was recently watching a video mentioning a study that it takes ~200 hours of constant contact on average to make a "close friend" and some 40-60 hours to get go from acquaintance to "casual friend", then 80-100 to be a what you'd simply call "friend".

Meeting up for 2-4 hours a month would take years upon years to make anything out if you don't supplement it yourself.

The likely study in question, for those interested.

Hall, J. A. (2019). How many hours does it take to make a friend? Journal of Social and Personal Relationships, 36(4), 1278-1296. https://doi.org/10.1177/0265407518761225