I think that's the wrong question to ask. Aside from those writing kernels, compilers, JITs, etc., developers don't need to care, that's the point of programming languages and compilers. Throw a toolchain at a developer and tell them to do it and they can do it.
Comparing RISC-V to OpenSPARC is comparing apples to oranges. One is an ISA, the other is a hardware project.
What do you mean by "We barely have a decent ARM ecosystem". Are you talking about the tools to build for those processors? Or the tools to build new ones of those processors? Or the actual chips that are available?
I'm basically always within 10m of at least a half dozen ARM processors, and a handful of 8051s. At worst, RISC-V could be equivalent to ARM, without many of the parts that suck about it.
Comparing RISC-V to OpenSPARC is comparing apples to oranges. One is an ISA, the other is a hardware project.
What do you mean by "We barely have a decent ARM ecosystem". Are you talking about the tools to build for those processors? Or the tools to build new ones of those processors? Or the actual chips that are available?
I'm basically always within 10m of at least a half dozen ARM processors, and a handful of 8051s. At worst, RISC-V could be equivalent to ARM, without many of the parts that suck about it.