Have had plenty of Macs with TrueTone, never noticed or cared. Used Flux, now NightShift. If your concern is eyes, that's better than TrueTone I'd have to imagine. If your concern is color accuracy, don't get a Neo. If your concern is the lack of a feature you wouldn't notice or benefit from, don't be a sucker.
Turning OFF TrueTone is different than never having it. Turn ON NightShift and you'll notice it. Give it 5 minutes, you won't. Human eyes are pretty damn good at adapting and responding to light too, you know.