Of course the marginal utility you derive from any purchases is subjective. But the potential savings impact is much bigger on the big purchases for most people

Of course the marginal utility you derive from any purchases is subjective. But the potential savings impact is much bigger on the big purchases for most people. E.g. if you spend $7 on an overpriced coffee at Starbucks every day, that's about $2,500 a year. Most people spend way more than that on their car or housing, so saving even a bit on housing/car payments would make way more of a difference than completely giving up coffee.