Yep. In my career, I've seen the rise and fall of RISC (on both Windows and *NIX), Apple's transition between several chip families, Sun's Sparc chips and even Intel trying to out-Intel with Itanium. You get hit with major roadblocks as well as death by a thousand cuts. It's extremely difficult to get it working in the first place, and then ongoing maintenance is no small feat, either.
I wonder if the Chinese government is "strongly favoring home grown solutions" with an ongoing infusion of funding, to do they just pay it lip service? China is a huge emerging market that plenty of vendors are trying to sell into, if they are really serious about this, it could actually provide the catalyst to make the ports happen. But no demand in the marketplace means little incentive for anything to happen.