Look here:It wasn't or I'd have known
There was a fairly large debacle around dropping Rosetta and one of the most prominent examples of software that would no longer work was Quicken. Hell, I would not even be aware of Quicken's existence, were it not from it being plastered over MacRumors et. al.
If you as a end-user do not take the time to double check if a piece of legacy software from about 5 years ago will still work on Lion, the surprise is entirely on you. If we all knew, you could have too.
Next time, do your homework properly.