Here is a significant Opportunity For Improvement:
It would be extremely useful if Steinberg would sweep through the website and forums and either remove (from the website) or mark (in the forums) those information updates which have been superseded. As I write, the original web article from September is still there, without even any links to more recent information, at
https://www.steinberg.net/en/newsandevents/news/newsdetail/article/important-information-regarding-os-x-1011-3359.html
The October web article is still there, also without links to more recent information, at
https://www.steinberg.net/en/newsandevents/news/newsdetail/article/el-capitan-status-update-on-compatibility-testing-3388.html
There are numerous user postings in many places around the forums, most of which are either wrong or seriously out of date.
And last but not least, there is this forum thread itself.
It would be a great service to Steinberg’s customers to have one and only one location for the official word on this, to make sure that it is frequently checked and updated as needed, and that references to it be added to user threads on the subject.
That would constitute a significant improvement in customer service on this issue.