Recently I was thinking about the fact that getting longer exposure time results in less impact of the initial vibrations (because of turning on/off of the enlarger) on a print. So my idea is to dim the light as much as possible (by using for instance smaller aperture - but maintaining sharpness of the lens; increasing distance between paper and enlarger, probably by the use of longer lens; somehow utilizing ND filters - probably the most straightforward idea) and of course take into account reciprocity failure.
On the other hand it seems (according to few Youtube tutorials) that nobody opts for drastically long exposures. I conclude that my reasoning has some pitfalls that I'm not capable of noticing and I wonder if you could help me find them.