> > Developer and SRE

> I'd say these are pretty interchangeable in one's career if they wanted to. The others not so much.

They are? Now I'm pretty new to this (despite my age) but my impression has always been, with the former you mostly focus on one project and maybe even just a small part of it, with the latter you are keeping an eye on half a dozen systems, have to know their ins and outs to babysit them, and occasionally firefight when something breaks in production.