> It is far, far simpler than having to get proprietary, frequently-updated software to play nice inside a secure sandbox. If they do, great, but separate devices ensures it isn't a capital-P Problem for you if they stop.

What I am saying (and what I do) is that it's far simpler still to just not rely on anything where this might be the case.

If my bank turned around tomorrow and said I can't use their website to manage my account, I would not attempt to get their app working on my phone, I would switch bank.