Comment by badsectoracula

Though IMO this misses the point of the OS which is the deep integration and fast UI the native APIs allow that these cross platform applications (and any application ported to Haiku through Qt and Java) ignore. There is no real reason to use Haiku over some Linux desktop (you can even make XFCE look kinda similar to Haiku/BeOS if you want) if the applications you use do not take advantage of it.