My Remarkable 2 E-Ink notebook for sure. I'm a pen and paper notes taker - R2 has been extremely useful in freeing me up from the pen and paper books. And my notes are searchable and tagged!
https://help.boox.com/hc/en-us/articles/10701398359572-Integ...
I loathe the idea of paying a subscription for a device I am already paying money for but I find pen and paper way more liberating than a computer. I am very tempted by e-ink notebooks as they feel somewhere in between the two