When comparing Haiku vs Devuan GNU+Linux, the Slant community recommends Haiku for most people. In the question“What is the best desktop OS?” Haiku is ranked 18th while Devuan GNU+Linux is ranked 26th. The most important reason people chose Haiku is:
After about 6 years since the alpha version, beta has been released on Fri, 2018-09-28. Check [here](https://www.haiku-os.org/news/2018_09_28_haiku_r1_beta1/) for release notes.
Ranked in these QuestionsQuestion Ranking
Pro Beta has been released
After about 6 years since the alpha version, beta has been released on Fri, 2018-09-28. Check here for release notes.
Pro It's debian
Devuan is debian just without systemd, it just mirrors the the debian archive and repacks packages that have hard deps on systemd
Pro Init based
Isn't based on systemd which can spread malware into your system.
Pro Most decent look amongst other XFCE distros
Default XFCE theme is unique of all the XFCE distos including MXLinux, Xubuntu etc.
Con No one uses it
It's a very niche OS that no one uses.
Con Small community
It is important when developing to be familiar with tools that other developers use. You can make any utility in any language you feel like, but if it's in an esoteric language that no one can read targeting a small platform that no one uses, then it was just something you did as a hobbyist, not as a developer.
This is not to say that Haiku isn't a great operating system to hack around on. Just don't delude yourself into thinking you're doing it to get familiar with tools that you need to know to be a better developer.
It's still in beta and quite unstable. Making it unsuitable for developing applications of any kind.
Con Impossibe to install on non-free hardware
Unlike Debian, Devuan offers no unfree install media so if your system needs unfree drivers(eg a laptop or a tablet) its nearly impossible to install devuan on it.