Can anyone actually logically demonstrate the difference between the following:
-$300+ Blender vs maybe $30(?)
-KitchenAid ($500-$1k) vs hand mixer ($20)
-Espresso machine (starts at $100-200, up to $1k+) vs various coffee options starting at $10-20
-Food processor vs hand tools/knife skills
-Breadmaker ($50-100) vs nothing
-Dishwasher(~$500 give or take) vs hand wash
-Upgrading stove/oven from basic ~$200 gas/electric to $500+
-Same for fridge
-$100 drill vs $20
-$1000 table saw vs $300
-A ceramic kiln ($???)
-A car lift
Because in my eyes, these are all *tools*. A tool is worth owning if you use it to do a job. If you do that job often, it might be worth having a nicer tool because it's more durable, more efficient, produces tastier results, etc. You wouldn't get an espresso machine if you don't drink coffee, or you find pour-over/French press/etc comparable or better. If you only get your drill out once a year for household repairs, a cheapo one will probably do. But if it's in your hand every weekend because you build stuff, you'll probably upgrade (maybe not to $100, I don't really know where the sweet spot between "plastic sh*t" and "overpriced sh*t" is for tools right now). But the point is: it all depends on your use case. Just because you or I might not buy it doesn't *necessarily* make it stupid.
A Roomba is kind of a ridiculous frivolity if you're a single person who wants more time to play video games. If you're a dual-career couple with 3 kids under 5, I expect every minute saved on chores is spent with kids or sleeping, so it's probably worth every penny to you! (And if you are a dual-career couple with 3 kids and don't want one, good on you!)
A 5 bedroom house is *beyond* ridiculous for a single person...unless you're running a boarding house or something. But for a family of 10? That might be tighter than a modest 2-bedroom for a family of 4.
A "fancy" trip to Europe? Might be to visit friends or relatives.
I personally find it kind of ridiculous how some MMM users will latch on to like a $100 expenditure on something that will last years or a $5 monthly budget item out of $5000 and just tear someone apart over it. If you wouldn't buy the thing, ok, state your case, but if someone doesn't take your advice...you can just walk away. Either they considered it and it's not in line with their values or you've planted a seed and they'll consider it again later. You won't get anywhere calling them an idiot over it. Calm down.