RE No. Just no.
The added cost for smart features is probably very little in the scheme of things. High end models tend to have wider feature sets in many industries I'm afraid, and it's no different with TVs. I could not find a tv with a decent picture which did not have smart features. Or internal loudspeakers for that matter (even if I never intend to use them).
On another note my particular TV allows the manufacturer to provide upgrade kits which plug on the side and update the processing etc. It's clearly mainly a marketing style added sale for them, but it does provide more future-proofing than you would expect.
And as I said, if you wish you can add a separate box whenever new formats need to be added and keep the high-end display as just a display.