> In 2014, a shop called VMS Software Inc (VSI) strikes some kind of deal with HP where they get to develop and support new versions of VMS while older versions continue to belong to HP. As part of this, they finally announce an x86-64 port. This port first sees the light of day in 2020.

And interesting factoid about the x86-64 port is that they've switched to LLVM-based compilers rather than making x86-64 backends for their legacy compilers.