Mei, for retirees I'd say keeping the home account isn't inertia at all. It's plumbing. Our UK pensions are paid into our UK account, our daughter pays us back for things through it, the odd subscription insists on a UK card, and the tax office writes to us at that address. Closing it would have created ten small problems to save one small annoyance.
A few things I learned the slightly hard way:
- tell your bank you're moving abroad before you go, not after. Some banks have rules about customers living overseas, and it's much better to find out while you can still walk into a branch
- keep a way to receive their security codes. More on that in Jake's thread, which I suspect will be busy
- update your address with them properly, even if the post goes to a relative. A bank that finds out on its own is a bank that freezes things
We move a fixed amount across every month and leave the rest where it is. Boring, but it hasn't let us down yet.