The concept could be quite appealing to people who do a tour around a few tech companies and then are ready to de-accelerate in their career. Maybe they want to coast FIRE but still have income and do something with their time. Previously, these used to be called lifestyle businesses.
It’s not the same. To decelerate is to have d^2c/dt^2 < 0 (where c is the career measure). To de-accelerate is to reduce d^2c/dt^2 while d^2c/dt^2 remains > 0 (in other words, to make d^3/dt^3 < 0).