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An absolute dream to work with, simple, fast enough for most people. (My benchmark when using it was about 20,000 concurrent connections a second under siege.)

It's the Flask/Sinatra of the C world, though you do need to provide your own router if you want anything a little bit more complex.

There is also https://libwebsockets.org/ which, despite its name, works well as a regular HTTP server library.

As an end user, I see it as a feature rather than a problem. Great library either way.

Why is LGPL a problem?

Embedded platforms come to mind.