So you couldn’t just by an SSD external drive and boot off of that?
Not wanting to start a fanboy war but I am a big believer in the right tool for the right job at the right price. For $3k I could build a monster PC with a stunning screen.
A quarter of the storage at a premium price isn't exactly appealing to a lot of people, regardless of how much faster it may be.
If you are willing to accept separate components, you can buy much cheaper hardware.