It's an interesting article. I've often questioned if the brain has unlimited memory capabilities (barring any damage or medical condition)?
This study gives an interesting, as well as logical, explanation. Accordingly, it apparently has unlimited storage, it just auto-adjusts. At least it is how I interpreted the article (and yes, my interpretations are not always correct.)
Anyway, it is amazing how efficient our brain is in making these 'adjustments' while we are consciously unaware of it. (You see, this is why I've always wondered if our brain might not have 'a mind of it's own' :) so to speak, like some type of symbiotic relationship, perhaps one part us, one part something else! ;)
In fact, this study would then make my blog (parts of it, at least) the remnants of opinions and topics my brain itself has possibly already re-examined/rethought and discarded. So, even if my brain has consciously reopinionated and deleted the original, it remains here, in my external memory bank, aka blog (journal/diary). I suppose it can be both a boon and an embarrassment, but one I can consciously either delete and/or rewrite/reword with newly acquired knowledge if I so choose. Which I don't.
Oh, and every time I hear medulla oblongata (it's brain stem talk between pons and cords), for some reason it makes me think of hakuna matata. Dunno, guess it's just the 'a' and 'ata'. K, hopefully my brain is now going to delete that.....oh no it's not!