[hakfoo]

You don't need to black out the platform for years.

If you covered one or two critical weeks (say the weeks just before and during final exams and midterms), per semester, you're looking at 672 hours of downtime or less. Even a large availability loss-- say, down 50% of the time in peak hours-- would be enough to make the program look risky and fragile.

A 50-student lecture could finance that.