Time-based rhythm effects on guitar parts can be an exception to the "always record dry and in mono" idea, if they are part of how the part is actually played, and an integral part of the sound.
But, like you already prefer, recording guitars in mono, and without effects, is preferable, unless there is a stereo effect that you are absolutely positive you will be using in the final mix of the song AND that the effect depth will be correct for the final mix.
Thanks, Paults. I don't want to record my guitar parts dry; I love the effects in the Kemper and want to record with them. I even prefer to record with delay and/or reverb as opposed to adding those in later.
I'd just really like to know which effects are stereo effects.