EDID errors or HDMI instabilities are not forgiveable at any price level, and of course the manufacturer ought to fix bugs in their hardware; but in reality they don’t. So where does that leave you?
Any given TV purchase is inevitably a trade-off; a matter of which of the negatives are worth putting up with. In my case, upgrading from my LG G6 would mean A: spending vastly more money than I can afford right now, and B: losing access to high quality 3D, which I will never, ever do until I’m forced to.
It’s also not quite as simple as the EDID being incorrect. There are some source devices that the TV is completely stable with, in all of its advertised modes. My Nvidia Shield TV, for example, despite all of its other deficiencies, is always rock solid in terms of HDMI signal; so is my Oppo 203, and so was the Sony X700 I owned for a while. But some time ago when I tried using an HDFury Integral with it, it refused to establish a 4K connection at all; and I’ve had issues with several cheap devices; and also, curiously, with my Lumagen RadiancePro in certain modes.
Having said all of the above, if I had thought that I would be the only person who would benefit from the change I’m suggesting, I wouldn’t have suggested it. There is a similar option on my Oppo 203; and Oppo wouldn’t have bothered to add that if people didn’t find it useful.