For me, it’s an electric toothbrush. It doesn’t matter if you go with Sonicare or Oral-B, once you start using an electric toothbrush, regular toothbrushes don’t ever feel like they clean your teeth properly. The smooth plaque-free top layer of your teeth that you can feel after using an electric toothbrush can’t be replicated with a regular toothbrush.
Cordless drill. I was a die hard corded guy but then I tried a friend’s one during a big move. Went out and bought one the next day.
I also agree, but to take it further, I decided I’d had enough of cables on my circular saw. Got a small, lightweight one, and omg, it’s SO good.