>
> Actually, besides improved performance because you have a good ground
> system,


Until you start working with RF systems, and those stubs start acting like
resonators on the 3rd and 5th harmonics of the frequencies in use..

Or, you blow something simple, like tying the micro's crystal caps to a long
fat ground track that the micro also ties to somewhere else.  You just made
a nasty shunt fed antenna.. I've seen this one thing severely flunk a system
for part 15, and after only modifying this, the same system passed easily.
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