Sorry I’m immature
On topic, I am in the very rarely camp. Once in while I’ll have trouble relighting, and after poking around I feel more unburned tobacco left, I’ll dump the loose ash from the top. Tamp and relight. Usually on deep bowls, which aren’t my regulars.
For me, it depends on circumstances. Some blends seem to smoke to a finer ash, also if the humidity is high it seems the ash-head gets ... denser, maybe? I know that the temperature is too high for any moisture to find its way in there, but it just seems to happen more on humid days. Maybe it's just that the bottom 1/4 gets wetter on those days, and with much of the ash gone it can more easily be dried and relit... Or maybe it's all in my head. At any rate, I'm in the "Sometimes" camp. I do it when it seems to need it, and it usually seems to help. If I've overtamped, then a stir will get it sorted. There's also a very real chance that I'm overpacking sometimes, as it seems to happen more often with pressed tobacco.
Yep i dump that ash mostly it depends on how tall or wide the bowl is on the pipe i am smoking on. My pipes that have a tall bowl yep i dumb that ash seems to smoke better for me perhaps the tobacco gets more oxygen when i dump. Same with my wide bowl pipes.
I went with rarely, which is to say under very specific circumstances, namely stacks/macarthur style pipes where having an inch or two of ash to have to relight through makes it necessary to do so, otherwise, no way, messes up the way it's loaded for me and screws with my ability to enjoy the pipe