If it requires more than 20% - 30% of your staff to sustain operations then you've implemented it wrong. So sure, you should be able to keep operations going ha

If it requires more than 20% - 30% of your staff to sustain operations then you've implemented it wrong. So sure, you should be able to keep operations going having sustained large staff reductions, but you aren't going to be doing anything to expand your business opportunities. Maybe Musk doesn't think that's required, but if they lose too many key operations personnel then they may be screwed.