The -10 undercarriage doesn't lift the plane by 10", it makes the rotation more user friendly be effectively moving the wheels back and creating more height at rotation.
The MAX 10 gear is a 'scissor lift" which extends for DEP and ARR and compresses for stowing.
grounded forever as we know it?
Currently, it is grounded forever as we know it. There will need to some interesting changes to get it back in the air, not just a dashboard light and some software.