Well, over the last 35 years I have learnt hundreds of card sleights. But, when I recently reviewed my arsenal of sleights regularly used, it amounts to about a mere 40.
As I'm sure you know, some sleights suit our persona/style/pace, some don't. Some are practiced and never used and some are too bizarre to practice in the first place.
I learnt Trigger (eventually) and then never used it. I'm not saying it's bad, but it's not my style. And, as I'm an impromptu performer who works mostly standing and surrounded, I don't use lapping or angly sleights. And, as I have small hands, I can't do decent centre/bottom deals...so I don't do them at all.
Oh yes, one of the hardest sleights I do well is Jennings' One-Hand Bottom Palm...and I never use it! Oh well...