As a long time BeOS (and Haiku) developer, I agree that the design is significantly cleaner. Your argument however is significantly false. Haiku has several design problems in the Kernel and the Filesystem, any serious use other than hobbyist is quite limited. Definitely Linux could have a better Desktop, but saying that the Haiku design is less fundamentally fragile is a complete lie. Linux desktop may be more conservative, and may not really adhere to a truly common standard, but they offer several orders of magnitude more what Haiku could hope to have by far. This includes Security, IPC capabilities, Virtualization, Containerization. Android is an example of a Linux platform, that still retains an high number of native apps, coherence of UI etc.