Quoting: PyrateI hope Valve goes all in and makes an official Steam client flatpak.

Also hope SteamOS finally moves to Wayland whenever the Frame and Machine come out.

Flatpak's advantages are curious, I've noticed that the convenience benefits it brings have started to come in opposition with the security and containerization aspect it first featured. For me, I'd drop the containerization if it meant Flatpak becoming the user package manager for all Linux. Maybe there can be a standalone variant for the security benefits so that aspect is still present in a separate capacity.

To me the containerization is the price for a few very important flatpack/flathub features.
A. Distro independence. By having every package keep to itself differences between distros don't hurt the packages.
B. Unsigned proprietary packages. FOSS packages are easy to verify, because you can inspect them for unwanted behavior. Especially, since uncovering the tools used is one of the primary ways to identify malware developers. It's, why many repositories can include packages from people they wouldn't normally trust or even totally anonymous sources. For proprietary packages you don't have this luxury unless your name is Apple. As such the trust placed in proprietary packages normally flows directly from the trust in their developer, which is achieved with having them sign their packages. Now the question arises, what if we want proprietary packages, but their developer refuses to support our obscure package manager and thus sign it. This is where the hybrid approach of containerization comes in: you might not be able to inspect the code, but you can inspect the container limits and at least assure yourself it doesn't touch anything it shouldn't touch.