The point is that you need to take care to make the implementation of that endpoint safe. It isn’t safe magically by itself.
| implementation = reality | magic |
|-----------------------------------|
| 999,999,999,971 (+1) | 0 |Elsewhere it was suggested that we can now replace POST with this query. I was trying to be cautionary because just changing the method alone will bring different behaviour. I did so in brevity because I was in a rush. IMHO, that does not call for snark.