Minimum version

Hi, my current keyboard was made with minimum version of Keyman 9.0 and I just realized that my other keyboard was in Keyman 10, and I want to harmonize them.

What’s the pro/con for changing this to Keyman 10? Should I leave it at 9 or should I always bring it as up to date as possible? Or rather as low as possible, to support older version of Keyman?

The compiler will warn you if you try to use functionality that isn’t supported by earlier versions of Keyman. There’s no real downside to supporting older versions if you aren’t using newer version features so I wouldn’t worry about it too much.