My personal belief is that the headphone hobby is pretty similar to a "car collection" hobby - just on a cheaper scale.
There are some that you use every day, perhaps for transit, perhaps for work - these are units that are "rough and ready", that get banged up a little, but are your tested and true warriors.
Then there are some expensive units that you keep at home, that you pair with a great amp, that you may only use on the weekends. Maybe something that's a little too big, delicate and/or inefficient for daily use, but is heaps of fun to use.
But then, you have those wildcards. For me, my Grado cans are the "wildcard" in my collection, that look absolutely amazing, but I choose not to use them much.
They handle well, and can throw their weight around, and some people might even use them as their daily drivers - but for me, they are another notch in my bed post, and look fantastic in my headphone display.
They are the hypothetical Porsche that sits in my garage, that doesn't get driven much... But looks great, and I feel proud and happy knowing it's there.