I wonder if we should have been prescribing 3 antibiotics at a time. This would be for the same reason we use redundant disk drives--the odds of one disk write

I wonder if we should have been prescribing 3 antibiotics at a time. This would be for the same reason we use redundant disk drives--the odds of one disk write failing might be one in 100. But the odds of 3 disk writes failing simultaneously should be 1 / million. If some bugs need to survive to develop resistance, this seems like it would reduce the chances.