I gave up on B&M years ago when I realized I was just wasting both our times. I wanted at home demos of a variety of equipment, listening to just the one brand they carried on my list just didn't cut it. At this point I realized I was going to have to become a complete diy in regard to assembling systems.
I was lucky in that I was old enough that I had lived through the golden age of B&M when dealers spent lots of time with me educating and allowing home demos, I also attended many shows and spent much time researching all things audio.
From this background, I began assembling a number of systems over the years, made mistakes, discovered my preferences. Over time I was able to assemble increasingly satisfying systems to point I may have my end game system.
With today's situation I'd have hard time relying on B&M for gaining knowledge and doing home demos. I'd have to do shows, do much research on line for educating myself and demo via used marketplace, keeping what I like, selling the rest. It's really golden age for diy system builder, not so good for those relying on dealers. The good thing is there are a lot of experienced audiophiles out there willing and able to help with system building, great resource, use them.