We did have a thread a couple of weeks ago that discussed the just released 300 series Bosch DW models in comparison with some Miele DW models. You can find that thread here.

But scrolling through the last few weeks of threads, I was not able to find a thread like the one you described nor did I have any luck with Google and Ask searches. There have been numbers of threads about some problems that some buyers have experienced, particularly detergent related ones, but I am neither recalling nor finding any threads identifying "all known problems with their older models."

This reply will at least get some traffic to your question. Maybe somebody else will have either a better memory or better luck with search engines?

I found this