For those that think the response is overblown, from the thread:

These images are intended to be a drop-in replacement for Steam Deck OS for handheld console-like gaming PCs like the Steam Deck (Lenovo Legion Go, ASUS ROG Ally, MSI Claw, and other hardware in the same space).

These are also to be used to create gaming theater PCs, for streamlined use on a living room television.

The issue with “just using Flatpak or a container” is that the gamescope compositor simply does not work in those situations, when paired with Steam’s Gaming Mode, as it has the same concerns as a desktop environment. There would simply be no way to serve Gaming Mode as an environment.

As such, moving to this would essentially force Bazzite, as a project, to abandon its primary reason for existing - alienating 2/3s of their userbase. The remaining 1/3s would be served a lesser experience for a variety of more paper cut reasons, and VR is already a complex topic which would get even worse.

It's a big deal because disallowing the native steam build would make it nearly impossible to run bazzite in a SteamOS-like experience (which accounts for 2/3s of bazzite's users)