It would be great if RISC-V and other open CPU architectures dominate the CPU and SoC market, but that is going to be a long time coming. lowRISC seems to be the best chance for that.
I also have issues with the fact that many parts of the ISA are optional. A general purpose OS needs some common level of support by the hardware. If it can't rely on some features it makes it difficult to support the different SoCs.