I personally went from Amiga OS up until 2000 or so, to BeOS and Linux and later Haiku.
Haiku is a great OS for former Amiga OS fans - it’s fast and responsive, and fun! I think I prefer public screens to fixed workspaces, but I much prefer the memory protection and pervasive multi threading of Haiku.
I’ve often wondered after R1 is out, if some Amiga OS features might make it into Haiku, like public screens. Might tempt some ex Amigans over. Maybe even feasible to have a global menu bar, given all menus use the same classes with BMenuBar?