Whoa there. According to the article, we have few new antibiotics precisely because the old ones have been so effective:
>Infections are not that common compared to other types of conditions like high blood pressure or high cholesterol. [...] They have to develop drugs that will make money, and that’s not an antibiotic.
When we had lots of development effort put into antibiotics, there were lots of new antibiotics discovered. Expect that level of development to come back if / when infections again become a bigger problem than high cholesterol.