Good enough for what? Good enough to end my curiosity about what else might be possible - never. Good enough to bring me a lot of listening pleasure in my den - I can pick up everything I need for under $1000 at BestBuy. Good enough that I’d rather have it than not have anything? A pair of headphones for under $20 and my phone.
Curiosity is mostly what keeps me going. I haven’t found a lot of satisfaction in just upping the quality to stratospheric levels on various components. I’ve found more from trying unorthodox listening arrangements and speaker configurations. This kind of experimenting can get expensive, and the creations that don’t work well can’t be taken back, and don’t have much used market value. I consider myself lucky if I can give the stuff away. Fortunately I’ve found that is always the case, so nothing so far has been so bad as to end up at the dump - except for components that I've inadvertently damaged beyond repair.