I have this experience working in academia too. Closer to paper submission, all the coauthors work longer days. Emails at midnight and sometimes even Zoom calls at ungodly hours are not unheard of. But once the paper is submitted, usually things slow down.

The people who don't slow down, usually end up burned out quickly. Their research suffers and it shows up in the quality of their work. Then the papers get rejected more often, which puts them more under pressure. It becomes a vicious cycle.