I noticed something strange.
In the past, if I struggled with some (new) technique or got rusty over time (not practising), I tortured myself with discipline and exercises.
I didn't have as much choice of picks as today, but noticed that with some picks some techniques were easier. But I somehow thought this is "cheating" and I have to fight and practise until I can play it with my Jazz III! Explore one pick and get used to it as much as possible, was the goal.
Now I have experienced something interesting. If I choose a pick that makes a technique more easy right from the start, I can then switch pretty quickly to another pick and it works there quite easy too! Much quicker training of several song parts possible that way. I think my brain just internalizes the "easy", flowing movements (without getting stuck) and remembers the easy way regardless which pick is used after that.
I play definitly different and better with a Jazz III shape now after experimenting with other picks.