Wasted Thousands on Camera Gear? Here’s what I kept.

I have way too much gear across Sony, Nikon, Fuji, but going from 3 systems to 1 isn’t easy.  How did I decide what to keep?  Lenses outlive cameras, to me they best define a brand’s identity. 8 lenses, 4 for work, 4 for fun. It’s a tight fit inside these 2 bags, which lens would I pick if I can only have one?