It's all good until your European bank starts requiring unrooted Android and iOS for their mobile banking app, then tries to force you to use that app instead of letting you sort things out at their building. Then the government starts requiring you use unrooted Android or iOS to sign into their website for administrative tasks, and so on.
The endgame is that I will keep a phone in a drawer next to a 20 yo hardware token I still use to access a bank. When on the move, we will see.
If that ever happens (what am I saying we all know it’s happening). Then just a phone in the drawer I use it just for such administrative tasks.
Then I'd switch bank. A lot of banks work with SFOS [1]. Given the way the US is acting, we are trying to lower our dependence on American services, and I very much doubt all banks will walk the US bandwagon. There's a serious market for something else.
[1] https://forum.sailfishos.org/t/banking-apps-on-sailfish-os/1...