YAGNI philosophy is reactionary
I see that one of those reactionary YAGNI articles is making the rounds. Most of these articles focus on the technologies themselves and forget that the developers behind them or using them are curious, enthusiastic and often extremely competent. There's a lot to criticize about "hype" cycles, but technology itself ain't it.
What is worth criticizing in "hype" cycles is that systemic misaligned incentives—a result of both market pressure and the way to have a successful career within company structures—lead to baroque software stacks of dubious quality and not lean, successful and elegant products.
What actually sucks is getting told to use "AI" for no good reason because someone wants to score a checkbox for Q3; because company culture and structure don't allow people to push back against CTOs and CEOs pushing some product because they read their vendor's whitepaper; because sales is incentivized to pump grandiose nonsense about half-finished technology. All of this leads to products designed as a side-effect of playing a game no-one has any actual stake in, instead of being designed around users and then taking the time to make properly technical decisions.
In defense of novel stacks
Just have fun and be open
So please, developers, don't think that YAGNI and minimalism is somehow "better" or "more competent" than exploring and playing and building things like mongoDB or serverless or AI or typescript or rust or single-page applications.
Explore, build, use, reuse, contribute, rewrite, package, play with all these technologies, because that is how we actually make progress in our field and how one becomes a better engineer.