Also it’s not even a choice. Busses are not mass produced vehicles their very regulated individually made commercial vehicles, and when the bus manufacturers say 'were not building manual transmissions as of X date, that’s it. It’s not happening anymore, same with ABS, and now electric, unless you want to start manufacturing busses, where you’ll also likely find out exactly why everyone is switching to electricity by 2030 for likely financial motives, and buck that to make a fossil fule busses, it’s not happening.