Hey - don't know what part you contribute to, but thanks for the work whatever you are doing.
Eclipse has been my mainstay for ~20 years now, and while I know lots of people probably more authoritative than me will vehemently disagree, I honestly see it as one of the best pieces of software engineering ever made. The flexibility of the UI, the plugin system, incremental compile, the concept of perspectives and the overall stability delivered given how it is built - a complex ecosystem of cooperating plugins - is absolutely amazing. Now I've reached the point of making my own plugins and contributing to others my respect for it only increased.
It's definitely a complex tool and I think the vast majority of people fall over before they get over the hump of learning to use it. For more experienced users, many people still have in their head the image of Eclipse from 2007 and don't realise that it's been on a path of steady but slow linear improvement for more than a decade - another testament to the underlying engineering.