That’s just if you’re having too much trouble with warping, which we generally don’t, and it doesn’t apply to perimeters or top layers, just bottom layers and infill. We’ve printed plenty of parts near solid with no issue at all. In addition, PHA is inherently more durable than PLA anyway.
We’ve tried every brand I can find, like Colorfabb AllPHA, Beyond Plastic BioPHA, and Bosk Regen. We usually order directly from them since it’s hard to find in a distributor, but we’re in the Northeast U.S.A., so it’d be really nice if anyone was making it around here.