I'm thinking to move to Blender and OH MY GOD, I'm a Corona's fan and I can't wait to see if Corona for Blender works so well like with my 3DSMAX2018.
I don't think that cycles can compete against Corona, which I think it's the best for some many reasons (the non needing of graphic card for instance, the main reason).
Cycles runs on GPU and CPU, with dailies it runs using both at the same time. Even had OSL support way before Max. So your argument really
holds no water... and latest advancements are on memory consumption which Corona is not that good at (yet have to check/test/study v2).
Corona's main advantage, using it with Blender, is its GI/UHD cache (most prominent with interiors) and
click-click tone mapping + post FX with CFB. Ease of use = less stress, pleasant time working, faster production