When Peter was asked about a Gravity performance at an event a few months ago, he initially dismissed the idea, believing there wasn’t a market for it. However, when the question was asked again, he acknowledged that if they noticed high interest, they might consider it. Given it’s got 828 hp it may be enough to satisfy 95% of people.
Perhaps the captains chairs are similar in that they don’t perceive a substantial market for them. However, if enough people request them, they may eventually be offered.
It definitely appears that they are certainly open to considering new ideas if they see a demand for them.