I've been successfully dodging this threat for over 30 years. That success is hinged upon my ability to, a.) keep my gear where it has been approved by management, and, b.) no noticeable accumulation of crap occurs, regardless of price, as dictated by management. The only tolerated deviations have come from my boys rotating some of their gear in and out of the house, hence allowing thtose rules to be bent as necessary. So, when I feel the need, I buy "my boys" a new amp/guitar/pedal/DMX light controller/digital audio interface. (I pray to the guitar-gods that she doesn't have an account here)
My wife doesn't really threaten, so I'm safe. As far as she's concerned, the gear is just stuff I use in my work, and she puts up with it.
But...I do get veiled disapproval indications when new stuff arrives like, "Don't you already have (insert number) of those?"
Fortunately, I'm as OCD about clutter as she is, so the only bone of contention is that I like to keep my guitars in my den. So there are a few guitar cases that kind of stick out against the decor. I mean, they're nice cases, but...
She thinks it's unsightly, and she's right, but my thinking is that even a decently finished basement studio is not a good place to keep fine guitars. If a pipe burst, or some other calamity took place...well, how does one replace instruments exactly like the ones I have? It's impossible. So I decided to be extra-careful and keep them in the den. That's the only issue for now.