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That sounds cool, but I don’t think it’s strictly true.
Memories that have many pathways won’t be lost due to a few broken pathways and are reinforced with further experience: learning or remembering.
Others are simply gone with neurons dying or the pathways getting severed.
Neurogenesis doesn’t happen as much in adults, they’re the longest living cells in our bodies - adult neurons last a lifetime
I boiled down the complex neurological system of organic memory in living beings down to a paragraph, of course there is room for a lot of nuance and sophistry.
Also: https://www.nature.com/articles/s41591-019-0375-9.epdf