The two main things that are limiting are that you can't take advantage of the unique strengths of the particular device you're running on
There was a reason I wanted specifics. This is a generic comment and it generally isn't particularly accurate anymore. Do you know of any specific things that would suffer on any specific platform?
performance always (and inevitably) suffers
So, at this point in time you have not given any kind of arguments that supports your position.
It's easy to parrot the "wisdom" of others, that's why I asked you to be specific. You weren't.