Everyone here is aware that slowest growth is still "growth".
They broke records in sales across the board in 2015
Indeed they are oversaturating the market in every which way possible but it has churned out incredible Revenue numbers... I can't speak for margins since I haven't actually seen the financials.
I would put an enormous investment in the standard 3 series next time around as that is the most important car... with that being said, it's still better than its competitors at the moment... the A4 is somewhat of a joke and the C class styling is really not for everyone, BMW still makes a product that many want, it's just no longer strictly a niche enthusiast brand.