It's not that hard to display whatever is coming in on HDMI-1. They usually get that working correctly in whatever firmware version the TV is shipped with, and I don't need more than that. They can even fuck up audio, as that goes through a proper receiver and external speakers anyway and the TV is thus constantly set to zero volume.
Well maybe you don't discover them until a year later when you connected some new peripheral on a previously unused input to discover it's unusable but there's a fix for the known problem.
Is it really all that difficult to envision a legitimate need for bugfixes on a "smart tv" containing so much software? These things are as much a computer as they are a display. And modern software development practices have veered far into the direction of "ship yesterday, finish tomorrow with updates."
Gets disabled by me immediately. I use a well-configured Logitech Harmony remote to orchestrate the various devices, hence no need for HDMI-CEC, which it's implemented differently by anyone anyway (and they mostly don't even consider that "bugs").
You should give it a shot again now, I also ignored it for years but with my most recent upgrades I tried it out and in some simpler cases, it works well!