Glad I haven't (although being retired, kids kicked out of the nest, mortgage paid, I could, for the first time in my life, find it). I started brewing as a student, with bits and pieces that I could find or press into servive cheaply and that's still part of the attraction.
If course I've upgraded my kit over the years to SS kettles. I have three in various sizes, but I only use one at the moment. I still save my 8 litre Volvic PETs for experimental batches and the beer brewed in my plastic fermenters is every bit as good as that brewed in the SS fermenters. If and when, out of curiosity, I decide to experiment with pressure fermenting, I'll fit a reliable pressure relief valve to an old King Keg.
Can't see there being any hurry for that, though as I've got at least a dozen hop varieties and many yeasts to play with first.
I fully appreciate different people brew for different reasons, and collecting shiny kit may be one of them, but it's not for me, ta.