Are you sure? As far as I understand, it may happen that everybody stops using the old interface (the distros choose what they compile into their kernels, I gu

Are you sure? As far as I understand, it may happen that everybody stops using the old interface (the distros choose what they compile into their kernels, I guess), and after a few years of that the kernel maintainers may decide to remove the old code, assuming it wouldn't be too much work. Don't know how likely it for this to happen in the near future, though.