When comparing Haiku vs Raspberry Pi Desktop, the Slant community recommends Haiku for most people. In the question“What are the best End-User desktops for Desktop PC's?” Haiku is ranked 3rd while Raspberry Pi Desktop is ranked 6th. 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.
Very resource friendly.
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 Uses GNOME technologies
The desktop depends on GNOME toolkits and backends and has to deal with their changes
Con Just another GTK based X11 deskop
It is mainly an optimized fork of LXDE.