As for salesforce.com you should see how much worse the things it replaced were.
I would also frame it in terms of usability rather than beauty. As a programmer one of my pet peeves is issue tracking systems that force you to fill out 25 irrelevant fields and wait 40 seconds several times to create a ticket. Not to mind that when you say you spent 4 hours on a ticket you might find that 4 hours got added to the estimate one time and the estimate got zeroed another time. A tell is that during standups the PM is moving post its around because it is too slow to use electronic tools.
In an environment like that what should take 30 seconds takes more like 5 minutes.