Less “not optimized”, & more “not supported”; IE, accelerations that don’t turn on, because companies like Intel, Broadcom, Samsung, & NVidia, have a long history of only giving preferred partner devteams, prerelease hardware access, much less any peeks at unobfuscated firmware.
That’s because normal Linux won’t be as optimised but unlike Valve they don’t want to put actual work into optimising it.
Less “not optimized”, & more “not supported”; IE, accelerations that don’t turn on, because companies like Intel, Broadcom, Samsung, & NVidia, have a long history of only giving preferred partner devteams, prerelease hardware access, much less any peeks at unobfuscated firmware.