Depends on what I am doing. I do teach irons only courses and have done so for several years as a planned progression of training. IMO this produces higher quality shooters when teaching or reinforcing fundamentals via irons. This goes for newer shooters or even when taking experienced shooters and breaking them down to the basics and rebuilding them. So yes I have irons only set ups.
I will note that during intensive irons only courses, shooters are exposed to a multitude of alternate or improvised shooting positions and scenario's including low / no light etc, that it quickly becomes clearly obvious where irons can be a serious limiting factor in a shooters performance especially in critical use training, scenarios, etc, to include force on force. IMO anyone who uses this platform for potential critical use applications are greatly benefited by having training with and deploying a modern capable red dot / optic.