>> - 54% Windows, 37% Linux, 9% MacOS (Linux numbers are going up...)
I'm surprised by the Windows/Linux ratio. I always noticed a quite stable ratio around 70% Windows, 20% Linux, 10% Mac (+/- 5% margin). Isn't just that more Linux people used JOSM during the holidays than Windows people? Such an increase looks strange otherwise.
It might be Oracle's license conditions. In the corporate environment, using the Oracle JRE requires a commercial license. Installing the JRE of OpenJDK is possible and JOSM runs with it, but counter-intuitive in multiple steps. I myself have written instructions for my collegues how to install the OpenJDK. Given that Windows is in particular popular amongst companies and users with limited tech competence, that new threshold might have scared off users. Best regards, Roland
