I also always have the same tick at the back of my head. I have put off learning/playing around with all SPA technologies because of this. To me it looks like

I also always have the same tick at the back of my head. I have put off learning/playing around with all SPA technologies because of this. To me it looks like we are increasing the surface area for a attack - again this is a hunch, a kind of smell test. But I also see that react etc are running away with all job offers.