550w will easily run a overclocked CPU and a GTX1080Ti
Yep, typical setup with 1ssd and 1 conventional and 1 optical - but it would be running to near capacity - but you make a good point.
I've always erred on having 100w/150w plus in my pocket - so my PSU last approx. 7 years - well longer as I pass them on. I've put this down to quality brands combined with running them at cruise rather than flat out under load.
When forum members give PSU advice, myself included, they tend to err on overcompensation - mine for the above reasons - but I sometimes think the GPU/CPU market has their hands in the PSU market too with their recommendations to sample testers...
Just out of interest what do you have stulid - minimum or overkill for silence and less stress?