That's not what BART's report says, at all. That is a worst case analysis. The Metropolitan Transportation Commission required all agencies to undertake an unusual analysis using scenarios provided by MTC. The report concludes that BART cannot cut its way to solvency in the given scenarios. The report does not reflect BART's actual projections or plans.
Okay, sorry if I am fearmongering. It's not my intent. What do you feel will happen?
From my perspective, there's a website that has the word crisis in the URL, a chart that shows a ~40% loss in revenue due, and the two-year SF budget shortfall is trending up - recently revised from $720M to $780M. I find it challenging to take away an alternative perspective when none is offered up on the website beyond "be a transit champion."
This is a bit too optimistic. BART in its current two year budget is projecting consecutive years of $300m operating deficits. That is very far from sustainable and not an unusual worst case.