Asklemmy

I wish Nokia N900 / N950 with Maemo or Meego OS. And full opensource, full MPL or MIT licensed.

I truly wish SailfishOS could be that replacement but I've been burnt too many times already.

Definitely Haiku, BeOS had a lot of neat ideas in it.

ReactOS would be kinda fun

Here's the link for Redox OS btw: https://www.redox-os.org/

Guix GNU/Hurd of course lol

GEM

Because it's truly outrageous

Maybe minix? Because microkernel.

Honestly, if I had this magic power, I'd pick something like Ubuntu or Fedora. The exact pick doesn't matter, I don't want this to devolve into a holy war, but I want to "The Year of the Linux Desktop" to stop being a tongue in cheek meme. I want Windows and Apple to have to make meaningful changes to maintain their market share.

Redox isn't Linux, it uses its own kernel. I want this one to succeed above all others, just because Rust was born to perform this kind of application: guaranteed memory safety when dealing with tens of thousands of lines of code handling hundreds of moving parts running thousands of different tasks, all at a very low level.

I'll second Plan 9, just because it sounds like scifi and truly takes advantage of how interconnected all computing hardware has become.

Third place goes to anything based on GNU Hurd. The microkernel architecture intrigues me, and I'd like to know how it effects the end user. Plus I'm just a big fan of the copyleft/FOSS aspect.

Also, I'd just like any mobile device alternative that's not AOSP, and Linux seems like a bad fit for mobile in general. Why do we need a fully-featured, all-purpose kernel when we're only gonna put it on a known number of SoCs and therefore a known set of hardware configurations? We could be optimizing the hell out of our privacy-friendly mobile OSes, but instead we've shackled ourselves to google or linux

Haiku, but honestly I'm just happy to see the conversations here

Nobody's mentioned Guix. It's a GNU project, which is like Nix, but has a number of novel features. I'll copy in from my own thread about it:

Based on what I’ve heard so far: GNU Shepard instead of systemd, a package manager that compiles things from source and allows user-defined compiler options, a totally different way of arranging system files, and Guile-Scheme is used for everything; it sounds like there’s no other kind of configuration anywhere.

It's planned to be Hurd compatible, so I'd argue it counts.

There are a few aspects we need to consider...

For the UI, I would go with beOS, Haiku is cool, but the look is a bit too modern, I love the clean look of beOS's UI

For the best compabillity, after a lot of work, ReactOS, a project aiming to create an open source os that is binary compatible with Windows 2000.

seL4

A formally verified microkernel

Serenity for sure. I love the 90s aesthetic and would like to see it make a comeback. At the very least I'd like to see their Ladybird browser become mainstream - we really need more alternatives to the Chromium family.

That "Unix" os from the og jurassic park movie.

I remember running BeOS back in the early 90s so I guess I’d go with Haiku

TempleOS, because for it to go mainstream, a sizeable chunk of the population would need to go fully insane, and I think that'd be interesting

OpenBSD. Imagine everyone just running a secure OS.