Kent Beck is just as bad as Uncle Bob! He drank his own proverbial Kool-Aid and went all in on the crazy XP programming fad he started (... which contains brilliance like requiring pair programming for every line of code written).
Look, both authors are very smart people who have great insights into development that we can all learn from ... but both also have the failing of being way too in love with their own ideas.
It blinds them to the flaws in those ideas, and makes it so when you read their work you have to be skeptical and evaluate each individual idea on their own.
It may not be dead, but it does seem a bit stagnant. Based on Google Trends at least (https://trends.google.com/trends/explore?date=today%205-y&ge...), Elm has the same general interest level as it did five years ago (despite going up a bit in-between).
Look, both authors are very smart people who have great insights into development that we can all learn from ... but both also have the failing of being way too in love with their own ideas.
It blinds them to the flaws in those ideas, and makes it so when you read their work you have to be skeptical and evaluate each individual idea on their own.