The on-prem is windows-based, we're delivering new version as msi. The goal of the cloud version is be easier to get up and running, since there's no installation steps and (I guess) less configuration to do. The company might want the on-prem to fade, but it won't happen in the short term since we still have clients. The on-prem is 15-20 years old, but not always actively worked on and with ~1M Loc (including sql scripts, setup, config files, but not the test suite). The cloud project started last year and I think there's already clients using it, but I don't have access to the code, so I have no idea for the loc.