Bitcointalk is one of the biggest forums I've ever seen,
Yes, it has been almost 12 years since Satoshi introduced it to the community in November 2009 and I believe this forum is still the largest among the many forum discussing bitcoin.
with forums going out of style, im surprised to see the amount of activity bitcointalk still has
Perhap you shouldn't be surprised to find out the statistic of this forum that users keep on using all the time. Although people think this forum is outdated compared to other forum, but so far I'm still quite comfortable without any problem since 2015 because basically forum will never be the same as social media. The development project is ongoing and maybe one hope that this forum will be friendly with android users who tend to use apps as opposed to website.