What a surprise it will be when users will just move to Blender cause the engine gives a good speedup if we're saying about CPU calculations. I think the market of Corona engine between Blender users can look really good. I think the time to ignore this and for waiting until Blender will be bigger is a huge mistake. Blender development seems really ignored, like another Sketchup. I really suggest you to donate the Blender add-on/build for Corona project. Lack of proper amount of development funds. I think here Blender is going to be more a way to go as software which features and workflow can be really profitable. Economical crisis caused by SARS-CoV-2 panic, which seems to freeze most of economy. But I am sure here is a way to solve this or by-pass this completely legally. Blender license seems to be an obstacle for Corona development, the stuff have been stucked on 'watching the development of Blender'.

Oh, we can't forget about BlendLuxCore, but this is still not the same like really artist-driven Corona. Corona seems to deal with it a lot better.

Rendering speed on CPU, especially when working on single GPU is the huge pain while using those engines. Many freelancers are using Cycles engine, but Cycles and Octane for Blender are still lacking some necessary features. Simply - great news, this should improve operability with general 3D softwares. For archviz geometries can be optimized/proxified for viewport display and work.

Here even are some people who really are using Blender and then exporting to 3ds Max just cause of Corona Renderer. Personally, and not only personally, Blender seems to be stable while doing archviz and modeling is even faster than in 3ds Max. I see some known 3ds Max modelers, archviz artists and plug-in developers are considering to move to Blender with their stuff. Things, in general are getting really seriously. Octane does have more interesting way - to run rendering inside Blender build, even in interactive mode, is using the licensing server that shoud be runned in the background. Generally V-Ray for Blender is coming, it would be good to take a research about operability between rendering engine and Blender. To be honest I can see some good and bad things happening with development of Corona export add-on and Blender development (also other known add-ons development)

Blender or vray