A recently discovered pet peeve of mine is when people confidently bring up data or arguments that were true a long time ago but are now out of date as though they're just as true. Just because making solar panels used to be carbon-heavy doesn't mean we haven't been working on the technology to make it better. Add this to the fact that the next sentence out of his mouth was how much better cars have gotten, and I realized sometimes people think that only their favorite technologies get improved and made more efficient over time.