For context re: Haiku OS (I had not heard of it before)
From the project home page [0]:
> Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
From the wiki page [1]:
> Haiku is a free and open-source operating system compatible with the now discontinued BeOS. Its development began in 2001, and the operating system became self-hosting in 2008. The first alpha release was made in September 2009, and the most recent was November 2012; development is ongoing as of 2018 with nightly releases.
From the project home page [0]:
> Haiku is an open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful.
From the wiki page [1]:
> Haiku is a free and open-source operating system compatible with the now discontinued BeOS. Its development began in 2001, and the operating system became self-hosting in 2008. The first alpha release was made in September 2009, and the most recent was November 2012; development is ongoing as of 2018 with nightly releases.
[0] https://www.haiku-os.org/
[1] https://en.wikipedia.org/wiki/Haiku_(operating_system)