There are two issues here:
There's Pete buying a car he's wanted for years and there's MMM writing an article justifying consumerism.
I like the way you divided "Pete" and the "MMM" persona here. It's an interesting solution. MMM lately is closer to plain Pete, but early on it was more clearly a larger-than-life persona with a lot more bravado than Pete himself would personally display in interviews, for example. It would have been a cute workaround if this blog article were prefaced with "Special Guest Poster: Pete" or even bring back our short-lived friend "The Realist!" It would allow Pete to be transparent with his community while still allowing the "MMM" character to be a "pure" icon of "badassity".
Remember when Pete used to write stuff like this?
Yeah, I remember the sentiments where Pete would be questioned about his uncommon frugality and respond that he in fact lives with an embarrassing or shameful degree of luxury already! The classic MMM articles sold the mindset and philosophy not merely as a path to wealth but as the correct way to live both for the planet and for your own happiness and well-being. Not a sacrifice, but the most fulfilling way of life. I do find it makes it harder to read the old articles and believe in that message to the same degree when the message has evolved over time. I definitely understand those who feel betrayed or disillusioned by "MMM", especially if they took the original philosophy deeply to heart, becoming an adherent of what MMM jokingly called his "cult" of frugality, and held Pete as the shining example and prophet of the One True Way to live. MMM even encouraged the mindset that non-adherents of the "doctrine" were "heretics": "clowns" or "suckas".
Of course, I don't begrudge Pete anything, and MMM owes nothing to anyone. But, I can't help but feel a growing disappointment in recent years that the self-appointed examplar of the message no longer embraces it. Maybe "convenience is a weakness that makes you a worse person" isn't a great truth of the universe spoken by the holy prophet. It's just something you tell yourself to get through the grind of the "accumulation phase". But I still want to believe there's more to the original message than that.
To be fair, I don't actually see a conflict, but that's because of my particular way of living.
For me, I see it that frugality often produces more creative, interesting, healthier, superior outcomes.
There's no question that the vast majority of consumerism doesn't really improve one's quality of life.
That said, I see early retirement as an extremely expensive luxury, but it's not the only luxury worth saving for.
Frugality, for me, has opened up levels of luxury that I never thought possible in a middle class lifestyle, and not wasting money on literal crap frees up so much for spending on things that have a real impact, whether that's more free time or my recent $1000 pillow buying spree, which trust me, sounds crazy but was worth every penny in context.
As I've said many times, thanks to the influence of MMM, I'm not cheap, I'm just a snob about spending.
It is very true that very few luxuries are worth the premium you have to pay for them, and I've learned that being able to afford a lot of luxuries still doesn't make their value worthwhile.
But there are some that offer disproportionate value in terms of quality of life, and freeing up purchase power to easily buy them when they come up is, for me, the biggest benefit of frugality.
We eat rice and beans, do DIY, and minimize driving, etc, etc, etc so that we have the flexibility and freedom to work as much or as little as we want to AND to be able to pull the trigger when something spectacularly worth spending on comes along.
Do *I* think a Tesla is spectacularly worth spending on? Absolutely not. But I'm not Pete. He's wanted this for so long, it obviously means something significant to him. I couldn't care less about the experience of driving and owning a Tesla, but I am freakishly obsessed with the ocean and paid about the same amount so that I can spend my summers sitting around watching whales.
Would that be worth it to Pete? Obviously not, or he would have spent on it already.
The key is to truly know yourself and know what luxuries can actually substantially improve your quality of life. Being able to walk away from work is just one of those luxuries, but there are others.