If the aim is to reach "net zero", then the ecosystem will have the same amount of CO2 in year N as in year N-1. That doesn't seem like a drastic situation (except that the level we stop at will already be well outside the recent historic average).
After reaching a steady state, we can then consider how much we want to continue scaling up the CO2 removal process, and for how long we want to run it at "net negative" levels. Whatever rate we choose should cause fewer violent disasters than the process of extracting and emitting the carbon did in the first place.
After reaching a steady state, we can then consider how much we want to continue scaling up the CO2 removal process, and for how long we want to run it at "net negative" levels. Whatever rate we choose should cause fewer violent disasters than the process of extracting and emitting the carbon did in the first place.