I like how Action Retro has pointed out that installing a fresh Haiku system is often faster than booting a Windows or macOS system.

As I said in another comment, I've only played with Haiku in a VM for not very much time, but I am a huge supporter of operating systems that are willing to break out of the codified mediocrity we've labeled "POSIX"; I suspect that we might be leaving a lot of performance on the table by constantly trying to POSIX compliant all the time.