I think associating yourself to a technology to the point of "end[ing] up in insular micro-communities" is the wrong approach. People shouldn't define themselve

I think associating yourself to a technology to the point of "end[ing] up in insular micro-communities" is the wrong approach. People shouldn't define themselves as developers based solely on one language (e.g. "I'm a php [only] developer"). I enjoy working with both low level and high level languages, with some more than with others, but they're merely tools. And no tool is the best tool for every problem.