Use them. I typically do use them but was attracted to the novelty of the ability to use an airlock with my corny kegs. Makes it easier to snake a temperature probe into the tank and monitor what’s going on in there.
Welp I paid for it this time. So much pressure built up it shot the cap on the airlock clean off and it landed 5 feet away on top of my table. Kinda cool, but I wasn’t there for the fireworks just the clean up.
And since the maid was off duty I was left cleaning up the mess.