This is why we use Spring. We have confidence that it'll be supported long-term and will continue to have backing from a whole host of companies.
It's slightly different in a large enterprise environment where a service might be fairly straighforward - take in input, spit out output to some data store. But for the kind of work we do - end-to-end webapps - we'd be doing ourt clients a great disservice to sell them on a microframework with our homespun implementations of security, transactions etc. bolted on top.