LOOKUPS VS CALCULATIONS. Which do you use and why? Would you kill off lookups?
Any time you can introduce the calculation engine in a place you wouldn’t expect it, your design options extend radically. The auto enter via a calculated result is no exception. For traditional lookup duties, consider using an auto enter via calculation option. You can simply set the calculation equal to the related value and they serve the same purpose. However, using an auto enter calculated value gives you much more flexibility in regards of what you want to do with the lookup operation in the future.
The lookup feature may be past it’s prime, but I still like it for automatic lookups on record creation. Read the whole thing and make up your own mind.