I have been ignoring the idea of using a full range speaker, loving the sound of my 1x 12. Lately I have been doing a lot of recording and using my studio monitors. When I went back to my 1x12, it sounded good but I did miss the detail of the studio monitors. I am thinking a full range speaker and dialing my tones in with that will be more like what the FOH is sending. I know that's been said here a lot. I have been on a quest to have my monitor sound closest to what the audience is getting so I'm thinking of trying a full range speaker and using the cab sims instead of cab driver/cabinet. Using my studio monitors helped persuade me.
If you've not used FRFR live, it is a different experience. It seems more dynamic but more sterile as well.
The Kabinet attempts ( and in my opinion succeeds) to get a balance between the two.