Funny, I've been hearing that argument since the 1990s yet here we are. This concept isn't new, military aircraft were been hardened against electronic attack for years by limiting them to very simple software loaded from tape.
There's a kind of product life cycle where people build tough robust systems with state-of-the-art technology, then those become dominant to the point where it seems superfluous, and people see opportunity in reducing inefficiency, overengineering etc., and adding new and genuinely beneficial features instead.
It's just a variation of the Normalization of Deviance. See this[1] short talk by Richard Cook for a very good explanation of the mechanism that causes the transition from "robust" to "superfluous".
There's a kind of product life cycle where people build tough robust systems with state-of-the-art technology, then those become dominant to the point where it seems superfluous, and people see opportunity in reducing inefficiency, overengineering etc., and adding new and genuinely beneficial features instead.