I generally have nothing to do with webdev, but my general expectation was always "okay, it's a mess now, and everything is terrible, but everything will settle down eventually". Instead, every time I hear about it, it has somehow gotten worse.
This would happen if browser technologies/standards would, you know, standardize. However, everyone and their uncle picks and chooses what they'll support, how they'll support it, and what extensions to the standard they want to champion for "standardization".
I'd say these days the support is pretty decent across the board, if you can limit your app to a relatively modern set of evergreen browsers (or at least - to the versions from "2 years old or newer").
