Hey trader144, I started running stereo when I bought my first stereo chorus pedal and ran it across 2 amp heads so yes that started me on the stereo path. Also as I did a lot of live sound mixing, I ran PAs in stereo when I could to get the best out of stereo reverbs.
When I put together an MP-1 rig with B200s power amp and Alesis Quadverb, I modified my Yamaha quad box to be stereo, while not ideal, I put some cardboard between the 2 speaker pairs to improve separation. I always used (and still do) a small mixer with 3 effects sends so I could keep the Quadverb stereo which I use for delays but mostly stereo reverb. This also keeps the dynamic range of the MP-1 more intact as I mix in the full wet effects with the MP-1 signal and the mixer feeds the power amp.
Later, I bought a MP-2 and a pair of ADA slant split stacks. Depending on stage real estate, I put them on milk crates and separate them as far as I can but still get the rack to sit across them. On bigger stages, I set the rack up closer to the front/side of stage and then I can have a bit more space between the cabs (couple of feet, maybe a metre or so). I try to position them so the top 12s in the slant split stacks open up on my ears so I don't play too loud (comparatively). I also have a single slant split stack that I rewired to be stereo or mono. I use that at rehearsals as less to lug. It's better than not being stereo but not as good as 2 separate boxes.