Just following your doctor's advice on diet (less red meat) might have 10-20% of the impact of switching to an EV for an average American.

The are diminishing returns to going full vegan from a greenhouse gas standpoint, beef and cheese are the big ones.

In general individual choices don't matter but helping kick of a cultural trend does. It's the same wierd logic as voting, no individual vote counts but voting matters.

Techies should really be leading the way on installing solar, heat pumps, induction hobs and EVs and in fact often are.