Its true that automatic use of ground planes can sometimes not be optimal. It really depends on the type of circuit and the frequencies involved. In some cases its better to maintain strict control over ground return current paths by using individual traces where needed.
I'm finding this thread very helpful as I have been trying to produce some simple pcb circuits with the use of EasyEDA. Is anyone aware of any other good cloud-based programs for circuit design? (I am currently limited to a chromebook for computing). Thank you to all who have shared their knowledge, I appreciate your insights on this topic.
I'd tend to agree based on my understanding as well, but be aware that there are some places where the parasitic capacitance from ground planes can be a problem. There are several high-speed opamps where the datasheets warn against having ground planes close to the inputs to protect against instability.
