VitruvianOS – Desktop Linux Inspired by the BeOS

https://v-os.dev

VitruvianOS

Vitruvian is the human-centric Operating System.

If you like BeOS, take a look at Haiku https://www.haiku-os.org/ , it's very nice and very usable system based directly on BeOS.
Haiku Project

Haiku is an open-source operating system that specifically targets personal computing. Inspired by BeOS, Haiku is fast and easy to learn but very powerful.

Haiku Project
I've been a fan of Beos philosophy since the Personal Edition but never had the occasion to run it on steel as I was too poor to have two machines back in the days, and now I miss login/password prompt at boot on Haiku. But i'm following it closely and I hope i'll be able to install it on my X220 for a web/mail machine !

You didn’t need two machines to run BeOS. I ran very smoothly on a Windows PC via dual booting.

BeOS 5 could even be installed on a Windows FAT32 partition alongside Windows (it created a 50MB virtual disk).

At one point in time I had Windows 95, Windows 2000, Linux (possibly Slackware) and BeOS 5 all running on the same single PC.