Count me as another customer that really wants this feature!

Our customers have repeatedly become confused by the HH:MM format, confusing 39:30 with 39.3 hours instead of 39.5 hours. It's way more intuitive for this to be a decimal format. 

It really is disappointing that Intuit, one of the largest software providers in the world, doesn't actually prioritize feedback from its users and has failed to provide a solution for over 4 years on this issues.