I've set up short artificial API call delays on couple of frontend projects for dev env. I wanted everyone to experience something closer to what the end user will have to deal with. Most common is not implementing loading state. It's easy to miss if everything is instantaneous. But this always seemed to bother everyone and it'd always end up being removed. Even if it was completely stripped from production code in build time and implemented in a single place. I can't understand the nuisance 🤷