Might be because anyone coming from 5e has probably been disappointed with monk before.

I'll miss my druid and probably regret it once I run into a problem I can no longer solve by being a giant spider about it, but monk is the class I'm itching to play next. I keep running across armor i would have had so much fun using.

I suppose I could just make Karlach a monk, but that would require forethought on my part and I don't always have her with me, to be able to properly enjoy it

I like playing monk because it's a very economic class, you don't need to equip anything to be effective.