SQL on it's own scales to a point, that point being however large you can make a single machine. Which can be quiet small depending on the data sizes in questio

SQL on it's own scales to a point, that point being however large you can make a single machine. Which can be quiet small depending on the data sizes in question. Beyond that you need to use something like Vitess (which the article mentions) but that comes with it's own overheads and caveats. You no longer have SQL really, you have Vitess. A couple years ago a company I was at tried to use Vitess but found too many edge cases and too much operational overhead.