There's still friction. Do you know how to do your taxes on international income, CGT, discounting transfer fees, etc? There are services which will do most of that for you, but that's still time to export/import the transactions, ~$50 to get the summary, some more time to deal with actually putting that info on your tax return.

Realistically that's probably 3h of work in a year, but I'd probably pay a bit of money not to have to do it.