You argued that using these features today blocked "billions" of people using old smartphones. Promises have been supported by smartphone browsers for over nine

You argued that using these features today blocked "billions" of people using old smartphones. Promises have been supported by smartphone browsers for over nine years. I do not think that using promises today prevents anywhere near billions of people from running your code, nor do I think that "5 years is a realistic number" for a feature that has been supported for 9. We're discussing whether using promises today impacts a significant number of web users.