Well, there are branches that just apply bug fixes. We have five years of support for our (yearly) releases. Optimizations kind of are features (sometimes kind

Well, there are branches that just apply bug fixes. We have five years of support for our (yearly) releases. Optimizations kind of are features (sometimes kinda bugs too). Why should those be singled out vs other features? The primary "bottlenecks" using postgres are different for different people. For you it may be performance. For others it's easier administration. For others it's SQL level query capabilities. Etc.