How stable and moddable is fairphone4?

Before buy a 0,5 k€ phone I wish to know only 4 foundamental things:

1- how is configured the hardware\firmare relative to flashing (can I always restore stock rom with a dedicated windows\linux\osx flasher and\or key combo or I need to unlock bootloader from a system menu? … In other words: is it brickable?)

2- is ita compatible with TWRP or other recovery able to do a full system backup\restore?

3- can I decrypt phone without losing data after the encryption?

4- how is rooting procedure? apatch or magisk? is it easy and stable ?

Do some reading in the forum, most questions should be answered.


And so on…

And yes its easily brickable