[mbell]

Yes, but its usually not worth the time to include all parasitics in a model until you get to very high frequency work.

Professional circuit/PCB designers already know roughly what the issues are going to be and can order of magnitude approximate well enough to know if its worth fully modeling or not. For novices, just understanding what the parasitics are is hard enough, much less adding them to a circuit that is often already fairly complicated for them. Most lower frequency stuff that novices will be building should not have an issue with parasitics, but pushin breadboards are just awful and the most common hobbyist op amps have plenty high enough gain-bandwidth-products to bring them into play.