I use a Chase Bliss Brothers with my Toaster. While there are some tones in the box that can’t be recreated with the Kemper, the main reason I use it is having knobs on the floor for a quick change. I think the Kemper drives sounds just as good if not better, and I’d rather use amp gain and Morph (which I do too). But having something with instant visual feedback and the option to easily tweak is worth it since that is the exact same reason I am using delay and reverb as outboard effects (the pedalboard is already on the floor and I have the space for it).
I did two years of all sounds from the Kemper, it was a worthwhile experiment, but I found I like this hybrid workflow better, it is flexible. If I was touring the same setlist, I would definitely put the work in and just use the Kemper and the remote