True, up to a point. Taking one of the sibling comments as an example, by the time you have accumulated 20.000 notes the older notes will definitely start getting "crowded out" if you don't review them.
I think there are two types of memories, and two types of notes as a result -- there's specific figures where you might only have to remember it for a couple days, and the exact value might be important, so that note/memory's value is very temporal. Then there's the stuff like problem solving strategies, where hopefully that information is integrated into your brain at some deeper level. The former might never be looked at again if it turns out you don't need the figure, the latter might never be looked at if the integration was successful.
Not really - I have old notebooks of notes that I havent thrown away but I also dont review - they are just musings and historical records, really you could throw them out but I like sometimes paging through them and looking at stuff I did.
New notebooks get a label on the front and only when they are full or I retire that hobby do they go in the notebook bin.
I think there are two types of memories, and two types of notes as a result -- there's specific figures where you might only have to remember it for a couple days, and the exact value might be important, so that note/memory's value is very temporal. Then there's the stuff like problem solving strategies, where hopefully that information is integrated into your brain at some deeper level. The former might never be looked at again if it turns out you don't need the figure, the latter might never be looked at if the integration was successful.