Haiku vs GNU+Linux

It's a very niche OS that no one uses.

It's still in beta and quite unstable. Making it unsuitable for developing applications of any kind.

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.

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.

The whole OS is mixed together with software from different sources.

There are just too many of them to know.

Since there are plenty of X11-Desktop environments and two big Widget Toolkits, every app works and feels differently.

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.

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.

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.

It's only a clone and some things work differently.

10-15 years ago I had everything working on my linux system bluetooth, graphic driver desktop etc.

Nowadays it is just a big mess: Distributions force me to use systemd a system I don't like since it is terrible to debug, KDE and GNOME(and its siblings) have moved even further away from each other no unlike years ago when they used freedesktop to unify things. There are now dozens of different GUI toolkits o choose every one with they own themes and usability(not to mention all the different minor versions like gtk2, 3,4 whatever that look and work all differently). in 2005 i could use bluetooth audio with alsa and no issues on every DE or WM nowadays you need pulseaudio to get it working some applications even need it to play audio. All distributions use different packaging formates (but they do and work all the same). You have now traditional apps and flatpaks, snaps and appimages. There are desktops/distributions that come with wayland preinstalled and the majority still uses X.org.

As the most unix systems this also comes without a graphical user interface by default.

Linux is actually the least secure OS and it is a security nightmare. Windows, MacOS, and ChromeOS are all far more secure.