Any chance we could get anecdotal evidence about this? Or better yet studies about it?

Without trying to be rude I would actually prefer you just didn't believe me right now. It is a field of enquiry that I haven't researched in a while and it would take me a long time to dig up the resources that I once found convincing. I seem to recall being surprised by identical-twins-raised-apart studies that focussed on the "big five" traits.

How much have you changed since you were 10?

I'm taller and my philosophy has changed (I was raised by religious believers). My interaction with that philosophy and personality is more or less the same (but matured and far more effectively applied.)

ETA: I google'd it and came up with this but neither I nor my university seems to have a subscription to peek inside.

It is not something I have read but my university seems to have access. If you are particularly curious you could message me with an email address.