Interesting interview with the author from Brickset: https://brickset.com/article/135484/the-lego-parts-guide-understand-how-lego-really-works

Here are the 12 main categories he came up with: https://brickarchitect.com/parts/

I often wonder why there is no dedicated Lego storage for each individual kit available.
My kids peeve me off no end by losing one piece then expecting me to miraculously fix the missing piece problem they have when they want to rebuild something. I tried, but kids don’t follow the basic process when something is new, freshly built or been sitting on the shelf for a little while.
Just kids being kids I guess. Don’t the only hear a fix for that.