[lemparin2020]

Not very familiar, but I do know there are syariah banks in countries with muslim minorities. Eg Al Rayan Bank in UK.

Just opinion, but I think as with most beliefs people aim to adhear in general but maybe not to the letter where not practical. Eg. a bitcoin enthusiast who has a conventional mortgage :)

If given the choice, I think people would favor banking products that fit their beliefs, but weighed against other factors. One of the limits on growth of syariah financing here for example is that it sometimes tends to be more expensive than traditional.

[Bishop_]

I kind of assumed it was one of those religious rules that might get thumped around a lot by those who are very devout but conveniently ignored by most average folks, like some christians not eating meat on Fridays.

Unfortunate that rules that seemed to have been designed to be fairer to those borrowing ended up making them more expensive.