That's something I've been pondering. I've got a couple of "no finish required" necks - a Canary one and a Goncalo Alves one - and I've been wondering whether it would be a good idea to finish them after all.
cant speak for the canary, but i have dealt with two gonalo alves necks from them and both benefitted significantly from a light oil. doesnt take much work but lifts the neck to another level.
i know warmoth dip the necks in an oil sealer, but this is similar to wiping oil on, fine for protecting it in transit, not the best feeling once assembled
anyway, on the Goncalo i think i used tru-oil. 2 coats wiped on, left overnight, then spend a good amount of time rubbing back with the 0000 liberon wire wool, you actually end up removing a lot of the tru oil thats been left on the surface but the rubbing process takes it to a whole other level
the alternative would be just a good rubbing with danish oil till really sleek - but this may need redoing a bit more often than the tru-oil.