"That took no time at all"

Many younger employees in big corporations have now understood that presentations with many slides that cover one point each are more effective than short presentations full of dense bullet point slides.

Their bosses might not be there yet.

I found an effective strategy to convince them: design the deck the way you want it, and have a test run. In 25 minutes, your boss understands that it takes the exact same time to present that longer presentation.