My work uses Redshift, which apparently has a different smoothing algorithm to Maya's default OpenSubdive Catmull-Clark. In Maya's default smoothing, border and corner vertices are not pulled. In Redshift smoothing, all verts are pulled to the next vert, whether or not it is a border vertex. This requires support loops to…
You could use the attribute spreadsheet to do this but the easiest way is to create a script that does this. I was feeling generous so I wrote a quick script for you and put it here: https://www.artstation.com/dankeating/blog/dKOZ/quick-script-for-changing-smoothing-values-across-multiple-objects
set the "vertex boundary" to "sharp edges" in the opensubdiv controls on the mesh to get the "square becomes circle" effect. There's a bunch of controls under the shape node in "smooth mesh" that you might want to adjust.
Thanks @sprunghunt Yeah, I ran into those controls previously. There isn't a way to set this option as the default, is there? A lot of meshes pass through my hands every day and it would be cool to not set that each time.