A good comparison would be FOSS. Richard Stallman inconveniences himself to the point of absurdity, but I'm pretty sure barely anyone does anything close to it.
I changed my diet, I live in good housing, but when I put the numbers on paper, I'm not doing much at all, and could do much more.
I'm not sure that's an apt comparison. rms simply has a workflow that doesn't require the use of proprietary software. It's not that inconvenient for him.
In on-topic comparison, it would be having a lifestyle where you'd simply have no use for a car: you live close to work, enjoy riding a bicycle, etc.
Of course, finding that workflow or lifestyle might limit some options, but once you accept that, it's not all that inconvenient.
I suppose so. More home cooking, sourcing ingredients, finding small markets, knowing the right restaurants, etc.
> The thing is, one has to start somewhere, and no one starts anywhere because they see the change as inconvenient.
That's probably and unfortunately very true, in software as well as food and CO2 reduction.