Yes exactly. Although I didn't buy a new guitar, but a dozen tuners. It finally clicked when I got one that was "real time" enough to see how the tuning shifts from high to low. This was before smartphones could do it.

Doesn't help that most tuners are still dog slow, none of the beginners courses properly tell you how the guitar actually works, or what a "chord" really is. They're all just "play this and don't worry about it". To be fair it does get you going.

How can you turn it off without turning off history ("My Activity") altogether?

I noticed the "memory" too and it's turned Gemini into a useless syncophant for me, but so subtle that I almost didn't spot it.

Using an M2 8GB Mac Mini, I only ever ran into problems when trying generative fill in Photoshop. There I get insufficient memory errors if the selection is too large.

Old too, and in my experience that was often slightly more work than fixing the bugs in my own implementation. I did swap out a borked module in the build an OS class once but otherwise used my own.

I loved those courses, great memories.