Who knows?? , that FW update is fraught with numerous issues, all of which have not be identified yet. For those who haven't done it yet ( I haven't) wait till DJI gets all the complaints sorted out and fixed. Im sure there will be another version coming out soon to replace the one just released.
It'll be gone, but no issue. Worst case, if you need it again to update batteries, just put it back on. tbh by the time batteries need a firmware update, we'll have seen 10 more iterations of fw updates. cheers.