"If you're not used to working in this way, it may seem annoying to get interrupted so soon after you were "done" with something, instead of just working it all out by yourself. But these interruptions are actually much more efficient when you get them soon, because you're that much more likely to remember what you were working on."

Think about the last time you were called upon to debug a problem like that. How much of the time you spent debugging was actually dedicated to fixing the problem, compared to the time it took to track down where the bug originated?

Integration problems happen when two people make incompatible changes to some part of the system.
The smaller the batch size, the sooner these kinds of errors are caught, and the easier the integration is. When operating with continuous deployment, it's almost impossible to have integration conflicts.