he stated his reasons for not posting here much anymore

Do you have a link to where he did that? I recall reading it, but it was long enough ago that I don't remember the actual reasons, and I'm not finding it quickly.

[Edit] I think this is probably the right comment:

Less Wrong requires no politics / minimal humor / definitely unambiguously rationality-relevant / careful referencing / airtight reasoning (as opposed to a sketch of something which isn't exactly true but points to the truth.) This makes writing for Less Wrong a chore as opposed to an enjoyable pastime.