There are so many ways to look at this. I chose the CLR route as a way to stop bringing an amp+cab+rack. I like the idea of using the FRFR as a monitor wedge and letting FOH handle FOH. Sometimes that works, sometimes not. As with the advent of CDs (I'm dating myself strenuously here), people continued to use analog recording techniques for a decade before they adapted. Live sound is similar. I still get pushback when I want to send an XLR feed to FOH instead of them using a mic on my monitor. Also I bought an IEM, so I want to transition to me having no FRFR onstage.
For people who like to have a cab onstage, you're not alone. Pete Thorn makes a great case for having a modeler onstage that feeds FOH, plus a guitar cab that runs dry for overall feel and mechanical feedback to the guitar. That would be a reason for me to keep an FRFR wedge in addition to IEMs.
When I switched from a guitar cab onstage to FRFR, I spent some time tuning a CAB model to match my guitar cab. It worked pretty well for me, but since then, MANY great IRs have come out, and I love having access to different tones on the fly. So once I switched to IR, I found I preferred NOT having a particular cab tone.