I LOVE forum games, if it's not obvious KEKEKEKEK, though like with a lot of people I haven't been active because of real life obligations.
being here for years, I've seen the drastic change from 3 sentences = high effort to 5 paragraphs at 7 sentences each = medium effort on a good day. I can definitely understand why that can be overwhelming and drive others away, and I can also understand why it can be super fun and exciting for others. Getting that for a reply is awesome, it feels like someone basically gave you fanart in literature! On the other hand, even though we're always saying, "you don't have to match length!" there's that unsaid feeling of, "But I HAVE to or else it's rude" and that can ramp up the doubts and anxiety
I think generally people are pretty adaptive and responsive to concerns with the writing forum games. People used to talk about their concerns with the length of posts and now we have more casual games that have invited people over (and it's also been a blessing for me, whose brain is fried after work and can only focus on short games). We also have lengthier games for those that do enjoy writing without limits.
However, I will say that there are some games across several forums that I felt could have been better as a private RP or a World. Some of these feel like although the idea is good, it's clearly intended for a select few characters. That might add to this clique feel some people have brought up.