But as time goes on the amount of conversions slows down because most of the stuff is already converted. Even the first gpl tracks were probably conversions back in the day from older sims. It has happened with every single game that supports modding. Early in the development it happens in every sim that the stuff you get first is mostly conversions. It takes a lot less time to make a conversion than a scratch made track. So most of the content has only been in the works for half a year.
And modding support has really been available about the same time. Ac modding has really only picked up speed this year.
