I was thinking of bringing up the same point, but one could argue that it's for own gain to pay less on the energy bill.

It can be said much more broadly that people are changing behavior. Not everyone for sure, but there are few people left that will not claim to be making different personal choices for environmental reasons. I think a lot of them are worth very little and there are definitely hypocrites that take multiple flights per year and compensate that by plugging out phone chargers while not in use, but it's still something that's apparently on their mind. People do do things, and some people do significant things. If GP says that they only see people complaining about others without doing anything themselves, that must be a quite narrow bubble (from my point of view, at least).

Edit: maybe a less debatable example is meat replacement products in supermarkets popping up. It's not as if we have more compassion with animals today than ten years ago, what changed is that more people are aware of the climate impact of meat. If nobody was willing to do anything, who's financing the production and buys the shelf space? The products don't even hold that long before spoiling, so they must be sold nearly as fast as meat.