I had this lens allready twice, I bought it as it's perfect in reviews (and also after seeing Mr. 135L (Dankata)'s perfect shots here)
But I had the 70-200 2.8LII IS allready, the IQ, sharpness & bokeh is practically the same.
I bought it on top of the zoom for it's compactness.
Recently I bought the 85 Art and sold my old 85 1.2L MKI, the 135 f2L had no IS like the new Sigma 135 (recommended +100mm), so high shutterspeeds needed.
Now I have the 50 Art & 85 Art.
Maybe I go to this setup :
35 1.4 Art
85 1.4 Art
The most difficult decission is always keeping the 24-70 2.8L MKI or returning to the Sigma 35 Art
I started with mostly primes, later I combined primes + the classic 24-70/70-200 combo.
Now i'm narrowing down my lenses from 6 up till the 4 best.