[kellros]

From what I can tell, the IIS team is embracing OWIN. Be sure to check out Project Helios (http://www.infoq.com/news/2014/02/helios). *Helios can be compared to OpenResty in the sense that the application runs directly on-top of the (core) web server, instead of a plugin/pipeline.

In my humble opinion, self-hosting is useful as long as it's feasible to reinvent the web server wheel. In terms of IIS that can include url rewriting, caching, compression, performance tracing, critical error logging, request logging, endpoint configuration including SSL (and SNI), zero downtime deployments, graceful shutdowns and much more.

The programming tendencies nowadays is to build highly specialized software (high cohesion), with only the needed dependencies (low coupling) and a small surface area to promote faster iterations (micro services).

Based on the above observation, the approach of Microsoft to release and endorse a cross-platform <core> .NET is commendable and is exactly what we need right now.

There's much to say about the downsides of the bring-your-own-x composition approach, but I truly believe the issues we face today will be addressed over time as the discipline and dedication of the programming community as a whole increase due to the increase in responsibility.