For anyone wondering what the young kids are calling it these days, it's "under consumption core" on TikTok where people post videos about how they reduce their spending.
https://theconversation.com/understanding-underconsumption-core-how-a-new-trend-is-challenging-consumer-culture-235417
Why do we have to rebrand established terms. 😂
Because they are too young to have ever read anything by MMM or other FIRE bloggers. They're developing their own culture around reduced spending, largely driven by environmentalism and cynicism, and it's more of a product of push back against the established history of most influencers being flagrantly consumerist, and essentially just walking product placements.
There are influencers now whose entire brand is pushing back against messaging that you should be buying expensive, unnecessary products.
So it's not a co-opting of the FIRE movement, it's its own, organically developed cultural movement in response to modern social media influencer brand promotion, wealth-porn, and tapping into the current zeitgeist of Gen Z economic despair.
It comes about organically within every generation. "FIRE" is just the Elder Millennial/Gen X version and I bet a bunch of boomer hippies looked at us and were like "wooooow...how original..."
Perhaps though the FIRE movement had more emphasis on using stocks to get rich and work less than today's frugality content. TT/YT content on stocks is mostly WSB-style stock picking and options gambling to get rich, buy lambos, and find true love. Neither the hippies nor gen z were optimistic enough to get excited about holding mutual funds / index funds for a decade or two. So the 2000-2020s FIRE movement was unique in that way - combining the ideas of frugality with income growth and index fund investing, and creating lots of content chewing through the tradeoffs.
IDK if such a collection of complementary ideas is possible now, because instead of using search engines (2000-2010s tech for finding content) people today let algorithms select what's next on their short-video-based menu. So right after "engaging" with a TT video on FIRE you'll be served up sombody's YOLO gamble on a meme stock, or some wealth porn, or maybe an influencer selling a fire extinguisher.
You could use "FIRE" as a keyword (2000-2010s tech for being found), but the algo/AI will listen to words like stocks, investments, retirement, or savings to serve you up a bunch of 19 year olds throwing paychecks at Gamestop, or a sponsored ad about a fintech phone app to lose money in a gamified way, or the ever-present cryptobro. These results actually throw you off of the FIRE topic, but are more financially lucrative for the creators and platforms. This is why most content today is about a single simple topic, rather than a complex interaction of topics. Single topic videos lead to other content on the same single topic in an unbroken stream, and therefore appear more popular than any synthesis of ideas.