I think a lot of devs are frustrated with the state of modern Javascript. As I speak I am waiting for "mvn install" to run for a system that has a Java back end and a Javascript front end which compiles both. I think the Java part would finish in about 20 seconds, the Javascript bit is more like 250 seconds. There would be 250 seconds of working instead of posting to HN if the system was "100% pure Java".

(To be fair I am mostly depending on an incremental build and I'd say Java turns around in 2s, Javascript in about 20s. One of those breaks my chain of thought, the other doesn't.)