It’s Linux, with all of the support that provides. Not a knock on Haiku, but if I can have a BeOS window manager and Tracker, while running modern Linux binaries natively, I’d be a happy.

For my daily machine, I need Docker, terminal, Firefox (for private browsing), Chrome (for work), VS Code and/or JetBains IDE. If this can feel a bit like I remember BeOs felt, that'd be awesome

You mean Electron apps.