I think it really depends on the family and the LO - some things just work better for some people. We have an all pocket and AIO stash and love it and I don't see that changing as DS gets older. We use BG pockets overnight.
We're a fitted and PF family. We put DD in a PF with a foofoo hemp insert and a wool cover overnight. During the day she wears either a PF or a fitted with a cover (wool or PUL).
Re: if PFs are best for NBs....
I use to love fitteds and wool, but lately I have been using mostly BG AIO's or BG OS Organic AIO.
At night I use a KCK One (double stuffed), or a GM/BubuBebe under wool.
HTH!
for NB, I liked fitteds - we used KL0s
after that I switched to PFs
I like BG3.0 at night