Devs and designers are now (more so than ever) different sets of people, and designers are now calling the shots in most places.

I'm a web dev, I know that ajax loading sucks, that without enough budget to do it right (and we never have enough budget) UX ends up broken, messing with scrolling sucks, page-based is best, don't make an app if it should actually be a site, etc.

Do I get any say? Not really. What do I end up building? Magic-scrolling ajax-loading apps, and if I have any budget left at the end of the job it goes on tweaking typography (i.e. designer-visible stuff) rather than fixing back buttons.

Which is to say, devs still know that this stuff sucks, but we're no longer in charge of the relevant decisions.