About the forums:

There are (surprisingly) forums for darned near every make and model car you could think of, and most of them are very useful. There are also several ASE master techs who have youtube channels. Occasionally the forums will spot trends and come up with fixes for issues before the manufacturer does. The web is a great tool, you just have to filter out the carp.

As to the above.....

Humans are generalists. Ants and bees are specialists.