This server looks so promising. I wonder why there is no interest in it?
All the other server software is on the ports system.
Have you ever heared the idiom "boring is good?" Apache is boring, it's a well known and understood web server, being around for ages, which of course has its quirks, but does its job. Nginx is quite newer, having replaced Lighttpd, but basically is the same.
Why there is not much interest in it, is quite simple to explain:
1. most of us probably will never have web sites which really do need such a sheer performance which Open Litespeed claims being able to deliver. So for most of us the theoretical improvement in reality is just useless for the few page visits a day we've got, so they stick with what they know instead of having to learn a new tool. And the ones of us who really do need such a performance know how to achieve it without Open Litespeed.
2. Many consider the benchmarks to be misleading and done by the company itself, and have so far not seen independent benchmarks yet.
3. Open Litespeed is basically a feature wise stripped down version of their commercial product. Apache is always the full deal.
So for most of us the decision will be something like this:
1. If we want to don't have a .htaccess headache, rewriting these rules to Nginx - take Apache.
2. When fast delivery is necessary or just having a server light on resources, take Nginx.
3. If even faster delivery is required, take Varnish.
Something like that.