Things changed, for the better. PTFE was bad because of PFOA, and now it's recognized as bad. So things like safety and other things have really improved! haha. Environmentally speaking, the most environmentally friendly isn't the most efficient lube, and the easiest to apply may not be best. When I had chains, I chose waxed chains, which are a fuss to deal with every 200 miles, but worth the hassle for the quiet ride and ease of cleaning.
My kid has opted for sheep oil for weekly cleaning and lubing, due to environmental concerns.