Yep, when implementing a simple OS for a class, it is clear that the 640KB limitation was imposed by the hardware at the time, not the DOS. So it wouldn't even

Yep, when implementing a simple OS for a class, it is clear that the 640KB limitation was imposed by the hardware at the time, not the DOS. So it wouldn't even make sense for him to say it, unless it was more akin to "it's enough for us".