You are right, regular writing does produce quality if you get "on a roll"
Sometimes it is the comments or questions on a post which inspires the next post. Some days there are 3 or 4 article ideas bouncing around my head, other times I run dry. For me I have to keep some momentum or it gets harder.
The same with me I often get inspiration from comments and sometimes it feels like I have a hundred ideas but if I don`t write them down I forget them quite easily or feel like it was a stupid idea anyway.
ALso agree with the momentum after a break it is much harder to get back
true! I've gotten inspo from comments before, too! I write the post ideas down actually.