I was cracking a joke, but as a matter of fact the AWS can indeed change a channel strip from mono to stereo.
… which is not what we’re talking about here. Our complaint is: Most of us work with other DAWs too, where you can go from mono to stereo, from stereo (or mono) to surround or Auro 3D or whatever within the same channel just by inserting a plug-in with the respective in/outs. No stunts with busses or dragging mono-files over to stereo tracks manually.
Stereo Chorus on a mono bass? Done. Stereo Phaser on a Moog solo line? Done. Surround upmix from a stereo ambience track? Done. … and so on. It’s simply a standard procedure since almost two decades now, with good cause.