For a short time now I have been using exterior grade overpaintable frame sealant instead of standard decorators caulk. It is close to 4 times the price but my reasoning is that being an exterior grade sealant it should out perform caulk. It seems pretty good to over paint in short time, about one hour on average but longer on bigger gaps. I don’t appear to get problems with crazing other than one occasion when in hot weather Dulux Diamond SatinWood crazed, but this was a one off.
It will be a while before I can fully varify the longevity of it. But any thoughts on my reasoning does it sound good to you?