Sure, but some things are more common than others: especially in smaller teams, it’s common that people work on the different bits of the code - and if you’re using multiple apps, this avoids migration conflicts. I have a team of 3 and conflicts have happened a couple of times in the last year with multiple (~11) apps. If we had one app it would be something we’d need to deal with every week. Moving models around, though, happens fairly rarely. I think I’ve moved around 3 or 4 models over the last year. Something doesn’t have to be perfect for it to be good or useful 
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