Wait, there are people running sites on anything below 5.5!?

I have not put a site on anything lower than 7.1 in the last 6 months, and will not do so either. Our latest server doesn't even support 7.0 or lower. At all.

Tbh, if WP stopped upgrading on hosts with PHP lower than 5.6, I think we'd see a shift super fast. Imagine hundreds of customers complaining about not being able to upgrade their WP installs...