>The problem for everyone else is not simply that Amazon ships quickly, I almost don't even care about that. The thing is that Amazon ships & delivers on a reliable predicted schedule. When I click an item on Amazon and it says "arrives by Tuesday" then 95/100 times it does. I shop at specific competitors who can do similar (B&H, Sweetwater, etc).

I don’t care so much for specific delivery dates (although they are a plus). Most important are free returns. Hence, I prioritize shopping at Costco/Target/Walmart/Home Depot/Lowes/Old Navy/Amazon/etc.