I personally loathe meetups, and love them. It just depends on what they are and how they're run.
In the mid 90's, CompuServe sponsored a Boy Scouts Explorer Post at their headquarters -- they gave us free accounts and then once a month for an hour or 2, a couple dozen kids ranging from probably 12 to 18 would show up, the adults would be so fucking cool and gracious and welcoming, showing us around the building (server rooms! conference rooms! etc). Each meetup, there would be like an adult-driven presentation about some piece of technology, then one or more of the teens would get to take over the projector and talk about something they're into (writing music in FastTracker, coding, hacking, whatever). One time they gave us a whole computer-version-of-D.A.R.E. "be careful what you're doing online re:hacking/carding/etc" presentation because one of the older kids was getting in and out of trouble with the law (and they were trying to help keep him out of the slammer). Really non-judgmental, just cool older nerds mentoring the next generation. They also did stuff like set up this giant demonstration booth at the fair with a bunch of computers to demo the HOT NEW ONLINE EXPERIENCE WorldsAway [0] lol, and had all of us man the booth and walk the general public through it. The whole thing was just really cool, very 90's, very honest.
Fast forward to early-mid-2010's: every single meetup in adult-life tech world was a thinly-veiled advertisement for either the company sponsoring the space, or the company sponsoring the presentation. Nothing felt organic, everybody had an agenda (evidenced by "speakers" arriving 2 minutes before their scheduled time slot, giving a powerpoint presentation on either their employer's current product or their personal library / A List Apart article / whatever they're promoting for clout, then leaving immediately afterwards). Outside of the organizers doing it for personal visibility and gain, I never understood the point of attending. It wasn't a party. It wasn't a seminar. They focused on the stage and the individual, not the collective. It was never an environment to actually network, or actually learn something novel and exciting, or fish for a job, or (even in the most reductive implementation) an environment to just fuck around and goof off and connect with likeminded strangers through a shared experience LOL - each one was promoted as all of the above though!
Anyways, I personally quit bothering with any kind of meetup years before COVID. I'd prefer the "skate park" equivalent, where its a static, asynchronous place that people show up when they feel like it, do their thing, and let the universe sort out the rest, but there are so many ways to do that stuff online (it's the internet, after all), that it feels like it would be a pretty hard sell to get people to show up in person anymore without offering something truly organic and special.
[0] https://www.pcworld.com/article/424450/this-old-tech-remembe...