When I encountered that research, I reflected on my own childhood memories and concluded that this DRAM mechanism is what is going on for me.
On an alternate note, I'm in my 40s now and I hardly remember anything. I have two little kids and am often shocked when I see pictures from a year or two ago (can't remember when they were that young). A few other tech friends have suggested things are similar with them. I am constantly having to learn new stuff in my line of work (AI) ... stuff from 2017 is often referred to as "old". I'm a bit worried my memory capacity is finite and starting to overwrite on itself (sort of like a fake SD card that overwrites content or the Johnny Mnemonic movie)
Also, memories become plastic and maleable when recalled, so just because they can recall something does not mean the memory hasn't been twisted by doing so [2].
[1] https://en.m.wikipedia.org/wiki/Spacing_effect
[2] https://en.m.wikipedia.org/wiki/Memory_consolidation (see section on reconsolidation)
Of course, there's a balance with living in the moment too, but as someone who forgets what happened yesterday, I try to document as much as I can.