I have used Simple Serial Plugin for years to control a Vaux matrix switch for home audio. I'm now in the situation where another plugin, iTunes Local Control, needs to be upgraded to v2022.1 for compatibility. So my fear is that if I upgrade to v2022.1, I'll fix iTunes Local Control but will break Simple Serial Plugin.
Jim Yergy wrote the plugin... not sure of his status. Would anyone have any ideas if this will continue to work, or do we need to look for another solution?