I don’t really want to turn this into a Redshift-bashing thread, but I do agree with you on your grievances regarding Maxon/Redshift’s unkept promises and a punishing maintenance plan that seems more akin to a subscription than something that actually benefits users.
Regarding Apple/Metal – if they really have a serious interest in competing and possibly regaining some of the lost pro user base, I hope they’re looking at developers like Blender and working with them to facilitate porting the technology to Metal.
For my own purposes, I have professional needs and clients that require me to work within OS X primarily. What I do like about Blender is that I can work in OS X, and then at render time shoot everything off to a Windows machine and let it do the rendering. Of course I would prefer to stay in OS X completely, but having a secondary machine devoted exclusively to rendering is not a bad idea.
So for the time being, my primary need is that Blender remains OS X compatible even if I can’t get the full Cycles benefits as Nvidia users do. What I am hoping for is that NAVI 2 presents a compelling reason for the Blender developers to support it in the future (through Vulkan I would imagine), and that in turn Vulkan can help make a Metal compatibility more possible.
Octane X is also a very compelling render engine currently, and since I am still very heavily based in Houdini, that is definitely something that I am looking at very closely.
Regardless, when I read comments about OS X users only being 1% of DCC users, that type of talk is what I would expect from a for-profit company, not from a foundation devoted to helping artists everywhere and without a profit motivation. If Blender development isn’t inclusive of small user bases, then who is?