Apple cares a lot about that. Their pricing structure across all models in any particular vertical are precisely engineered to keep you effortlessly moving up notches on the pricing ladder into higher margin models by selectively omitting/upselling specific choices.

For the Neo, it's:

  + $100 -> $699 Macbook Neo (well, I probably want Touch ID like my iPad...) 
  + $100 + $400 -> $1099 M5 Macbook Air (8 GB feels a little tight, but this new Air has 16GB plus a better CPU...)