Keep in mind that the scheme was well past its best by 2016, so whilst we would love to have that choice and those APs now, it used to be significantly better than that in previous years with over 4,000 cars available!
When you consider the phenomenal increase in makes, models, engine variants (petrol, diesel, MHEV, FHEV, PHEV, BEV etc etc) that are available in the market nowadays compared to back in the schemes heyday, it brings the current choice of 750 into sharp perspective!