Just to provide one example - about a year ago I moved from a 12 year old Gmail address to another address/service. The lift for updating people, services, etc. really wasn’t that much. I left the gmail around and I do log in once a month or so but the last time I remember anything of interest coming there was maybe six months ago.
I also exported all of my emails from Gmail. I recall accessing them once maybe a month or two after the move, but since then I haven’t touched them.
In general I think people attach much more significance to things like email addresses and phone numbers than is necessary. Frankly I’d much rather things like that change from time to time so they aren’t so easily used as semi-permanent identifiers.
