noted, I change the title to make that clearer. CBTs are/should be the starting point to play with any of the "big planes" (anything that needs an ATPL licence

noted, I change the title to make that clearer. CBTs are/should be the starting point to play with any of the "big planes" (anything that needs an ATPL licence to fly), because the systems are pretty complex and unique to the aircraft, they aren't like cars that when you've driven one you can drive them all (licences are actually specific to aircraft designs, known as type ratings)