I worked as a developer in electronic payments for 5 years and we had to go through a months long process to certify the code with the financial system. My bosses were paranoid of any changes I made (to a silly degree) and we had a silly amount of automated tests.

We were a small startup with an underpaid staff and I’m not sure if more than 1000 people used our software. What they’re doing is completely reckless.