People have hit on it already, but for me the difference today from when I was here in 2007 is mainly the way I consume the internet. Back then it was pretty much only on the computer, which was fine for this site. Today the vast majority of my internet use when not at work is with a phone, and I'm sure this applies to a lot of people, especially those younger than 40. I think everyone would agree this site is sub-optimal on a phone, so it is just more cumbersome to visit than it used to be, as I am on my computer far less than I used to be. I can go for days without going on my computer but that wasn't the case in 2007. So I have to make more of an effort to come here, or else use the site in a way that is more difficult.
This is not a deal breaker for me, and probably not for most people, but I'm sure it keeps at least some people away some of the time. I know that I have looked at other people's threads much less than I did previously and this may contribute (but I also have a more busy job and 3 small kids I didn't have before, which probably contribute more).
I am curious about the idea above that the pandemic may have delayed some BDs. The opportunity for an A is certainly down, but I wonder how spouses being with each other much more has affected things. I can see the logic either way: for some, maybe familiarity breeds contempt if a spouse is thinking of leaving, and all of the flaws the potential WAS sees are exacerbated when you see the other all the time. But for some, especially if the main problem was that you never made time together, maybe more time together was helpful to remember the love you once had. I feel like we were a little more of the latter at the beginning but then became more of the former, but it's hard to say without her telling me her thoughts about that.
Me: 43 W: 41 Together 2009, Married 2011 Sons 10 and 6, Daughter 5 Bomb 2/21/21. W moved out 10/2021