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Then you will like JSR-371. This is extending JAX-RS to deal nicely with routing to HTML templates.

Which is why my favorite "micro"-"framework" -- is Dropwizard, which is fully JAX-RS.

I suppose it's because if your legacy products are already built with what's essentially a HTTP-RPC protocol, you're not going to want to build a REST-inspired framework.

I think REST is like the 3rd normal form of databases. In theory it's great, but in practice people only try to get close enough to the abstraction.

> JAX-RS has a nice API without much boilerplate and it is more powerful than most "micro web frameworks".

This is true. But it is usually much more intimidating for people starting out though. What the micro-frameworks offer is a quick turnaround time.

JAX-RS is just a specification, but implementations of it are not that fast, compared to other Java frameworks.