They are far from dead, just less popular. We would host small gatherings regularly when we were young (mid 30s now). Things died down a bit when the internet hit and we would stay up all night at home playing CS 1.6 looking for 5on5 server on in quakenet IRC (good old times).
I resparked this, when I hosted this for my best friends wedding as a best man's gift for him. Was the same fun as when we were young. We kept going and started again visting https://www.northcon.de/ which is once per year in Germany. Many recommend to visit https://www.caggtus.de/ but we yet have to make this one happen.
One thing got harder though: aligning everyone's schedule. Life is happening, and this is fine. Wonder how long we can make it to NorthCon :)