This is hugely important to 3D printing, and generally: no-one talks about it online (at least, not with any authority: more “blind leading the blind”). Which is silly: the engineering behind this is obvious (and it’s often obvious from looking at a 3D printer that it’s been under-engineered in this critical area).
NB: I don’t know which parts of “correct, obvious” cooling are blocked by stupid patents that should never have been granted. That might excuse the poor design of most printers today. Might.
My experience so far is that “more cooling of printed object is better”. But that’s an over-simplification…