Strange that they don't mentioned CSS-frameworks like Bootstrap or Foundation.

Since I found them, my direct use of CSS went down a lot. Often I can simply develop an application and buy a finished theme or let someone create one for me.

There were other areas I wanted to ask about, but I chose to keep the survey a bit more focussed – especially as it stretched to 19 questions already.

This could be something I look to include next year though if there’s interest in finding out about usage.

Yes, just seemed a bit CSS-heavy, when I had the feeling in my dev-career that CSS isn't a big thing when using a CSS framework.