Are there people here who actually unit/integration/end-to-end/stress test (almost) everything? Or is it a common fact that nobody has time/budget and/or needs to do so?

I like to think I test all the code I write, but to be honest, I think it's closer to 1 to 5%

The budget argument tends to be BS. The amount of money a full test suite will save you almost always outweighs the cost of development

Depends on your company and the scale of your solutions. In my experience, small projects with a small-ish user base don't tend to get very good test coverage - it's just not worth it for developing company or customer. Large scale projects with potentially 100s or 1000s of users or systems for which stability is hugely important will get full teams and weeks of QA.

@samk don't count on it. I have work on a project with over a 100 developer yet no tester. As you can expect it was chaos at each release.

Yes, where I am working now we do that. There are many teams working on the same project and we do continous integration and as such, everybody here can deploy to production, so here it really does add value to do so. It's just TDD all the way.