When comparing Haiku vs GNU+Linux, the Slant community recommends Haiku for most people. In the question“What are the best Operating Systems for x86 PCs?” Haiku is ranked 2nd while GNU+Linux is ranked 3rd.
Ranked in these QuestionsQuestion Ranking
Pro Very Fast
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 Only need 512mb ram
Pro Runs perfectly on old Hardware
Pro Many different desktops to choose
Just use whatever you want. Some are lightweight, others are full of extravagant features. There is a flavor for each taste.
Uses the same userland as other GNU variants.
It is a Unix clone.
You don't have to pay anything.
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 UI quite different to other OSes
Con Many distributions
There are just too many of them to know.
It's only a clone and some things work differently.
Con Most Distributions are not LSB-conform
The most Distributions don't follow the Linux Standard Base which results in different package formates, package management tools, bootloaders, init-systems or even filesystem hierarchy standards.
Con GNU Copyleft
The coplyleft in the GNU licenses make it unattractive to many developers. It s also impossible to port GPLed Linux improvements to other more open operating systems like BSD or Haiku.
Con No interface Guidelines
Since there are plenty of X11-Desktop environments and two big Widget Toolkits, every app works and feels differently.
Con Frankenstein OS
The whole OS is mixed together with software from different sources.
Con Often limited by decisions of the Kernel developers
Support for the latest features in Linux is often limited by their kernel developers, for example, Nvidia once had added patches to support Optimus on Linux, however, the kernel developers rejected those patches resulting in still no official Optimus support for Linux.
Con Most 3D drivers are not as fast as their Windows counterparts
The only display driver that comes close to their Windows counterpart is the nvidia driver. Both AMD and Intel drivers miss a Control Panel on Linux to adjust more settings than just your resolution they also usually much slower than their Windows counterparts.
Con No graphical user-interface
As the most unix systems this also comes without a graphical user interface by default.