Do you run Steam inside gamescope as well ?
Nope I don't. But that's because running Steam isn't really a thing for me to begin with. I don't own my games through Steam aside from a couple that are only accessible through it. Whenever I need to play those, I access those through another system; be it another distro or (God forbid) M$. For the games I've played on secureblue, none of them were owned through Steam. Hence, running Steam inside gamescope has not been something I had to do yet. Unsure, if it even works as supposed.
Does your setup support casks ?
I actually don't know. It probably doesn't, though. EDIT: Found the following within Bluefin's documentation: "Note that the cask functionality in homebrew is MacOS specific and non functional in Bluefin, flatpak is used instead."
I was hoping that this reply wasn't needed π . In all fairness, some of the replies found on ycombinator definitely offer legitimate criticism. However, secureblue's dev team didn't just ignore all of that as they can be found discussing on the very same thread. Since then, they've actually implemented changes addressing these concerns. For example:
This was raised as a good objection to some of its design choices. This eventually lead secureblue's dev team to maintain twice as many images for the sake of offering images in which this was handled differently. And it didn't stop there, it has continued to output a lot of work addressing concerns both found on that thread and outside of it. Consider looking into its commit history. Heck, even some of the GrapheneOS-people have provided feedback on the project.
Of course, no one dares to claim it comes close to Qubes OS' security model. Nor is this within scope of the project. However, apart from that, I fail to name anything that's better. Kicksecure is cool, but they've deprecated Hardened Malloc; a security feature found on GrapheneOS and that has been heavily inspired by OpenBSD's malloc design. By contrast, secureblue hasn't abandoned it. Heck, it elevated its use by allowing it to be used with Flatpak; something that hasn't been done on any other distro yet. This is just one example in which the secureblue dev team and its various contributors have shown to be very competent when it comes to implementing changes that improve security beyond trivial checkboxes.
Peeps may name other hardening projects. But fact of the matter is that I'm unaware of another hardened Linux project that's quite as feature-rich:
Please feel free to inform me if I've forgotten anything. So, basically, if you want a hardened daily driver for general computing, then one simply has to choose between Kicksecure and secureblue. I wish for both projects to flourish, but I've stuck with the latter for now.