If you're maintaining it, then I think you get a fair vote in it's architecture going forward. Things that are plainly problematic now didn't seem that way to a

If you're maintaining it, then I think you get a fair vote in it's architecture going forward. Things that are plainly problematic now didn't seem that way to a different group of people in a different context before it was even created. Perhaps it was a cascade of poor choices, but regardless, identifying problems with the architecture in the context of today gives a huge advantage over those who were putting it together under who knows what conditions (at work or elsewhere). Just like the never ending "turn this Excel workbook into an app" stream of work, refactoring older apps will be a constant. Focusing today's conversations on yesterday's mistakes only detracts from the work left to do (which is to say if your architecture change arguments are valid, there should be ways to justify implementing them today outside of "it should've been done this way in the first place because then we wouldn't have had those problems that are now solved anyway")