I’m a client-side technician working in a predominantly Windows environment for the last 8 going on 9 years.
Out of all the issues I have seen on Windows, filesystem issues is rather low on that list as far as prevalence, as I don’t recall one that’s not explainable by hardware failure or interrupted write. Not saying it doesn’t happen and that ext4 is bad or anything, but I don’t work in Linux all that much so me saying that I never had an issue with ext4 isn’t the same because I don’t have nearly the same amount of experience.
Also ext came about in 1992, so 31 years so far to hash out the bugs is no small amount of time. Especially in terms of computing.