I entirely agree. There are some fairly simple rules of thumb that are worth following as a routine, like operating an NMC battery between 20-80 for day to day driving, also balancing as recommended and doing a long charge every six months. Although even that last is only really good for keeping the GOM honest, I'm not sure it really affects battery life (might be true for the regular balance too).
But beyond that, there is a danger of turning EV drivers into nervous wrecks trying to follow increasingly complicated routines in terror of shortening their batteries' lives if they don't. That's why I like Euan McTurk's video. He lays out the possible risks, but then puts them into perspective and reassures people that unless they're ridiculously careless they'll be fine, and they might even be fine if they're ridiculously careless too!
I mean, the magnitude of an effect is really important, and that YouTuber doesn't go into that at all. Like my friend's husband never letting the petrol tank in his Merc fall below half full because of what some garage man told him about the undesirability of having too much air in the tank. OK that damn Merc has passed its 30th birthday, but I'm not sure that's why.
I don't like the LFP video for a few reasons. One is that the YouTuber isn't a professional electrochemist as far as I can see. He's someone with some knowledge of the subject who is reading papers written by other people and then extrapolating from them. At one point he even mentions that the paper's authors comment that someone else doing a different experiment found the opposite effect! Another is that he doesn't give any idea of the magnitude of the effects. All that trouble to extend your battery's life from 400,000 miles to 401,000 miles maybe? Or from 20 years to 20 years 6 months?
Another is that he is coming, at least at first, from one angle only, longevity. There are, as he acknowledges later, other considerations, like keeping the GOM honest and simple convenience. And finally, when he gets round to considering these issues, he ends up with a contradictory series of recommendations that's only likely to confuse and worry people even more.
