[chch]

Reasonable! I've just been through my fair share of primary email addresses over the years (be it from my ISP, university, or the webmail provider du jour), so the idea of an email address being forever unchanging was a bit incongruent with my experiences. :)

[frou_dh]

As usual the solution is to add a layer of indirection by getting your own domain name and then you can swap out backend email services without changing your address.