One edge-case I've noticed with Apple's subscription billing and heard other people talk about when implementing billing systems is changing currencies/countrie

One edge-case I've noticed with Apple's subscription billing and heard other people talk about when implementing billing systems is changing currencies/countries. Apple, in line with most people's expectations, when you cancel a subscription it doesn't cancel immediately and prorate a refund. It just stops future billing and lets you serve out your remaining cycle (gyms and other meatspace places do this). The problem is you then have to wait until your subscription expires to transfer your account to a new country/currency.