Depends on whether you’re talking about components/systems that you don’t feel the need to ever change, regardless of inclination/budget or those to which you have such an attachment that they’re going nowhere, ever. In the first category are my Martin Logan Spires (and Martin Logans in general). I’ve been tempted of late to change these for 15As, but every time I listen to them, I think, "Why would I want to change?". Budget probably won’t change though for a few years even if I change miming - I’m building a passivhaus, which is going to swallow all available resources (as an aside there, our passivhaus consultant deeply disapproves of valve and Class A amps - or would if they knew what they were 😆). In the former are my Spendor BC1s and accompanying Quad 33/303 - I bought these in 1977/78 as a student and they’re most definitely keepers. I also have the astonishingly synergistic combo of Tom Evans/Graham Fowler’s amp. designs: the Finestra 3-box preamp and the Alecto II+ monoblocs, plus Hydraulic Reference turntable