I struggle with this. I feel so guilty for replacing my four year old phone this week, even though my old phone has had hardware issues for more than a year. There wasn't really a puritanical element for me, it seems to be just from growing below the poverty line.
The flip side of it is I've accidentally joined the FIRE movement. Making a moderate tech salary for most of my time since graduating college but feeling guilty about spending means I'm now in my early 40s and don't really have to work anymore, or at least, could comfortably take any job I want without worrying about what the pay rate is. I don't really know how to feel about that. After my last job in tech I took about a half a year off before realizing I also felt guilty about not working, and took a job I wanted. But there are also weird feelings from working because you want to at a workplace where most everyone else is working because they have to.
The flip side of it is I've accidentally joined the FIRE movement. Making a moderate tech salary for most of my time since graduating college but feeling guilty about spending means I'm now in my early 40s and don't really have to work anymore, or at least, could comfortably take any job I want without worrying about what the pay rate is. I don't really know how to feel about that. After my last job in tech I took about a half a year off before realizing I also felt guilty about not working, and took a job I wanted. But there are also weird feelings from working because you want to at a workplace where most everyone else is working because they have to.