The Dawn of Haiku OS (Spectrum)

It's roughly the same split as Linux. So for example, most hardware drivers live in the kernel, but printer drivers (because they don't really do anything directly with hardware) live in userspace just like a typical Linux distribution. The low-level bit banging graphics hardware drivers live in the kernel, but code for drawing windows and so on lives in userspace. Similarly for audio the software mixer lives in userspace while the hardware drivers live in the kernel, the same split as any modern Linux distro (this is true even though Haiku uses OSS drivers, for which the mixer is usually in the kernel) Filesystems live in the kernel, but they have looked at implementing FUSE. Networking lives in the kernel, including both drivers and the TCP/IP stack.

If you ask one of the people actually /working/ on Haiku's kernel about this they don't care. The "hybrid" claim comes from the fanbase, not the developers. To remove the claim from Wikipedia you'd need an authoritative third party source to say it isn't true, and in topics like Haiku there's a lack of such sources... Unfortunately, being able to "cite" Wikipedia, you will see this claim spreading, and then those recitations can be cited on Wikipedia, snowballing. As I said, for an important topic someone would step up and fix this, but for fans making a bogus technical claim about a hobby OS it's unlikely to happen. Genre claims for obscure bands (e.g. claiming some band "invented" a genre years before it was popularly recognised) are likewise subject to fan distortion on Wikipedia.