Maybe it depends on what you're prototyping. In web dev I see what you mean. But in game dev I'm often prototyping something to see if it works at all, or to

Maybe it depends on what you're prototyping. In web dev I see what you mean. But in game dev I'm often prototyping something to see if it works at all, or to check its performance. Ignoring types is faster when spending 1-2 hours/days quickly hammering out something that just barely works. On version 2 or 3, add typings. Maybe it also depends on the timeframe of the prototyping project. After a few days it can become tech debt. (Though I still suspect there are some long term advantages to untyped.)