[let_var]

None.

And my reasoning could be a strange one. My knowledge of mathematics (esp. probability and statistics) and algorithms, and my memory used to be pretty sharp. I could retain a lot of information, and perform fast manual calculations using log book. All that started to deteriorate when I started relying on search engines for everything. No doubt it was convenient, but I lost touch with foundational concepts. My memory and speed are not what they used to be.

So as long as I can. I’m going to keep co-pilots and ai/tools at bay.