It's not. But, the fact that we could and it was straight forward still amazes me.
In our case the first time we needed to, we needed SSE and at the time there was no ring-jetty async interface (it's a long time ago so I'm forgetting the details) so we moved to aleph. Much later, we wanted to try out http-kit (self-indulgence) as we were operating behind a proxy anyway for performance reasons and it made a significant difference.
If we'd just started with http-kit that would have been fine. I guess it comes down to what features you need.
Also I 100% agree it's something ideally you would want to avoid a in the case of databases for example so much performance is left on the table because for some reason we want to be able to swap between SQLite, postgres and mySQL. Which in practice you never want to do.
As the former maintainer of Aleph, I'm very surprised you ran into a situation where http-kit was faster. Or do you mean it was just preferable to develop for?
In our case the first time we needed to, we needed SSE and at the time there was no ring-jetty async interface (it's a long time ago so I'm forgetting the details) so we moved to aleph. Much later, we wanted to try out http-kit (self-indulgence) as we were operating behind a proxy anyway for performance reasons and it made a significant difference.
If we'd just started with http-kit that would have been fine. I guess it comes down to what features you need.
Also I 100% agree it's something ideally you would want to avoid a in the case of databases for example so much performance is left on the table because for some reason we want to be able to swap between SQLite, postgres and mySQL. Which in practice you never want to do.