tl;dr
install Sailfish on Pro1, you can always go back to Android


O yeah.

Get some popcorn!
The glibc/Android Linux war is starting again?

Having tested Android in v2 on N900 (or similar, do not remember) the first time it was a waste of time. Then lollypop? on N9 it was already evolved.
But now (on business Samsung in v9) it is really a full OS.

But I do not like it and keep my private one on SFOS.

Two apps simultaneously on a hand-sized screen is not multi-tasking.
Android cannot read (nor write) a Linux formatted ext4 SD card!
You are doomed to G**gle

Shame is that nowadays you need some Android/Apple device for banking already. Or carry another TAN generator with you. And I am afraid I also have one bank that relies only on that sh*t.