Think there are a number of reasons why there is little activity - and much the same on the BOA site. If you look at the posts here, only about half are for Bavaria specific issues. Owning and running a Bavaria is relatively trouble free compared with some boats. The boats are generally well put together and use well known makes of equipment, and more importantly perhaps the majority in use are relatively new. Also many boats are owned by commercial operators such as charter companies which have their own sources of information.
Activity is likely to increase as boats get older and on the 3/4/5 owner - particularly when major refits or replacements are needed. That is what you find on owners sites for older established makes of boat.
Time will tell.