If I google “50 must have” I get about 2.8 million hits. (Don’t even think about googling “must have” without a qualifier.) That’s a lot of stuff I have to have: a hundred million things or so. Even if 99% of these are duplicate entries I’m still in for a million things. I had no idea I needed all that stuff. And seriously, I find it hard to believe I must have even 50 things, much less see how I would use 50 things in a way that convinced me they are “must have” things.
“Must” is such a big word. Let’s use it carefully.