The sources I've been encountering make it sound like ramping down is an option up to a point, and then fluid dynamics kick in and the next flow rate below ~60%

The sources I've been encountering make it sound like ramping down is an option up to a point, and then fluid dynamics kick in and the next flow rate below ~60% is 0%. I'm giving them some credence because they're very obsessive about the oil industry, but a bit of skepticism because they feel a little apocalypse heavy.