Yes, those SU toolbars are always off at start. (ruby extensions)
But the toolbars of added plugins are always on OR off, until I play with the script.
For instance LIghtUp and Subsmooth are always ON, but
Fredoscale, Keyframe Animationand TOS are always OFF,
to name just a few.
There are a lot of different ways of coding the toolbar display in the scripts out there.
Updt: Even Fredo's newly updated plugins still are off at launch. Maybe this has to be settled with somebody at Apple.
Updt: Looks like a Toolbar last_state is always set to 0 at launch. Is it possible that the TB (or it's variable) is recreated at each launch ? I'm no coder ...
p.s.: Let's stick to the floating toolbars for now.
And address the mac top toolbar later since the problem is half solved (by opening a new window).