There are a bunch of lithium ion chemistries that have come to market more recently

Like what? [Citation required]

If you think rechargeable battery R&D from 10 years ago isn’t making it into mass produced products today, you’re just not paying attention.

Please provide examples.

I mean, as much as a person who doesn't work in research and development of energy storage, or work in industries directly related to it, I personally feel I've kept up. The day Donut Labs announced their battery I was watching review videos about it, and I want to believe, but until I see it for purchase, I'm not going to call it a win.