Can one ever be "done" in this hobby?

Kaitty, you're excused and please don't come back (my wishful thinking impulse kicked in). Regarding the subject at hand, note the word "hobby." Changing components including cables and tubes or whatever can be FUN, and I, like many, don't change things very often except in my case maybe tubes, and that's because tubes are an inexpensive personal esthetic testing device. Otherwise, my sort of recent switch (couple of years) to a small single ended amp and efficient speakers is working for me, mostly because the music coming at my earballs sounds sublime...hobby...fun hobby...

I almost forgot. Nobody said audio nervosa can’t be fun. Think of it like gambling. Sure, it’s an addiction. But it’s fun. Even when you lose it’s still fun.  

This is a hobby where "done" usually means "done for now". I've been there countless times. There are just so many different designs and implementations to explore and listen to. With loudspeakers alone we've got single-driver, 2-way, 3-way, line-array, horns, panels, omni's, monitors, floor standing, etc. etc. Never mind driver size, materials, and crossovers. I could go on but y'all know what I'm saying. So, for me it's not so much nervosa but simple curiosity. I think it's part of being an audiophile. Love of music is the driving force and, let's face it, we love the gear as well. Do you really need to upgrade? Of course not. Need has nothing to do with it.

I have just about come to the conclusion it is very similar to a sick addiction I had for decades.... Cars....
How much horsepower do you really need?

Who cares?

Old saying .... Too much is never enough!

I have likely blown hundreds of thousands of dollars over the years on the quest for more power....

It nearly makes me ill to think of it now!

Nearly ... Lol.

Sure was fun at times!

Piloting a 70 Old 442 on its back wheels for the first 60 feet of the quarter is an essential memory!

Wish I had that car now... Oh darn there we go.......