Well-read and thought-out article no doubt. And your argument about not being static a person is sound.
I myself lean towards identity being all about memories (experience will be included there) as if someone were to lose their memories, they'd be entirely a new person. The changes throughout their life are an essential trait of the memories, as memories need not be static.
So we agree on this then. Doesn't it make you think how fragile we humans are? susceptible to so many vulnerabilities.
We are vulnerable in many ways, more instant ones. And without caution. Im thinking of the thousands of people who died in the last earthquake in Turkey. Losing memories is a far-fetched one on that scale.
We are very fragile individually, there's no doubt.