To add something useful, OSes are the one area where reinventing the wheel leads to a lot of innovation.
It's a complete strip down and an opportunity to change or do things that previously had a lot of friction due to the amount of change that would occur.
To me, it seems like the opposite is true. Operating systems feel like a solved problem. What are some of the big innovations of recent times?
As far as the actual OS, the new sheaves and barns thing in Linux is neat. We need innovation in RAM compression and swapping to handle bursty desktop memory needs better.
The main problem, and the one I'm trying to solve, is that as a software engineer, you have little incentive to make something that millions of people will use on the Linux desktop unless you have some other downstream monetization plan. You will have tons of users who have questions, not code contributions. To enable users to better organize into their own support structures and to make non-code contributions, I'm building PrizeForge.
Even desktop environment is not solved. I'm typing this from a relatively new metod of displaying windows - a scrolling window manager (e.g. Karousel [1] for KDE). It just piles new windows to the right and it infinitely scrolls horizontally. This seems like a minor feature but changes how you use the desktop entirely and required a lot of new features at operating system level to enable this. I wouldn't go back to a desktop without this.
The immutable systems like NixOS [2] have been an absolute game changer as well. Some parts are harder but having an ability to always roll back and the safety of immutability really make your professional environment so much easier to maintain and understand. No more secrets, not more "I set something for one project at system level and now years later I forgot and now something doesn't work".
I've been on linux desktop exclusively for almost 15 years now and it has never been as much fun as it is today!
I would love to see a complete overhaul of those.
In my opinion, if I type "xeyes" and it works (the app shows on my screen), then I should be able to start any other X11 application. However, gnome-terminal behaves differently. I don't know why precisely, but using dbus-launch sometimes works. It is a very annoying issue. A modern Linux desktop system feels like it's microservices connected by duct-tape, and sometimes it works, and sometimes it doesn't.
I've long wanted a scrollable/zoomable desktop, with a minimap that shows the overall layout. Think the UI of an RTS game, where instead of units you move around and resize windows. This seems like something in that direction, at least.
How does Karousel work with full screen applications, e.g., games?
Agreed, but...
> rewrite the kernel
Why would you do that? The kernel already has all the tools you need for isolating apps from each other. It's up to userspace to use these tools.
You can build a skyscraper on top of the foundations of a shed, and the kernel devs have done an amazing job at that, but at some point you gotta conclude that maybe it is better to start from scratch with a new design. And security is a good enough reason.