It’s not warranty that’s being talked about, it’s insurance
I think indicators are the nearest to being a primary control as you can get once you take into account steering and the go and stop pedals, it’s a material function to driving, I’d argue more so than gear select which isn’t touched when moving, and therefore the consequences of it malfunctioning are greater than anything other than steering and brakes, and the time you actually use indicators are during the busy times of driving, ie junctions, lane changes, roundabouts, so just when you have the greatest demand on your cognitive skills whilst driving.
But it doesn’t matter what you or I think, it’s for the insurance company to decide, unless you like the idea of being personally liable for any third party claim should the worst happen, all for the sake of asking the question.
I also find it somewhat amusing that “the thing I like about Tesla is you don’t have to pay extra for options like heated seats…” and yet many of the people who say that are advocating paying extra for indicator stalks. Apply my “what would you think if BMW, Audi or Mercedes did this?” test and many supporting Tesla on this would be at the front of the queue to criticise them.
Everything about the Highland seems to be a massive step forward, if the Performance comes with better seats and improved suspension even better, it’s just so frustrating to be so close to a peerless car to go and do what they’ve done, and I say that as both a Tesla owner an£ shareholder.