How to select hard-edge poles ?

[Dimitri]

It is a good idea... I would like to see it in a video...

I have tried a 'create tubes along selected loops' way of producing bevels too on booleans... Select seam lines > create a four edged tube > boolean union between the main object and the tube > delete the middle line of the boolean-ed tube > clear > and, there, you have some kind of bevel there...

The results are not good, admittedly... they work only in some very limited cases...

The experimenting with booleans continues however... : - )