But although a system compatible with R5 is a "fixed goal" for project participants, Aßmus says that "Haiku is open to new ideas and many BeOS features have already been extended or replaced with modern versions.

"If an idea is too crazy however, we can always say, if it wasn't in BeOS R5, it doesn't need to be in Haiku R1. And it really helped the project stay focused."

Aßmus was an Amiga user until the late '90s when he started looking for a replacement system.

"I had heard of BeOS as the system that some Amiga developers switched to and that they liked very much," he says.