Pruning azaleas should be a mortal sin, IMO.
OTOH...NOT pruning forsythia should be too! LOL!
I normally wouldn’t prune them, but I’m trying to help them recover from when the previous (idiot) owners pruned them like boxwoods. That and they fact that they’re growing onto the deck.
But I won’t prune the forsythia. I’ve got it along the woods in the back. The larger and more unruly the better.