You'll probably find amazing dissertations on the matter over at ranime but basically while we didn't get the sheer amount of anime we do today we had better produced shows and untested IPs had their shot to get an anime adaptation. Today they make anime on the basis of 'what profits more' and most studios heavily outsource to taiwan and korea because the industry simply can't handle the pressure being put on it by having 40+ shows airing at the same season. Animators are literally dying from overwork. It wasn't this bad when the japanese economy imploded in the early 90ies (the problem of the day was a bunch of OVAs being left unfinished, this killed the OVA market) so I'm not really sure what gives. But at least for me I can say anime peaked in 2007.