@Morgan_Hardwood I can’t wait.
Maybe something else to consider regarding startup time:
Most programs start within a few seconds, but display their first window/screen/messages almost instantly and after that, the rest of the initialization continues.
E.g. with PS CC 2018; you see the logo screen appear immediately after starting the program, then you will notice some messages scrolling through the logo screen and finally the program is ready for use.
The same with for example, Microsoft Office programs.
Seems to be something psychological? First display any kind of picture/logo/message, so that the user has a confirmation that there is something happening, and in the background, the rest of the entire software package is loaded & initialized.
Tip for RawTherapee also?
E.g. start RT, display a kind of startup logo and/or window frame, let some single messages scroll through a window, as to let the user know the program is doing something, and then finally open up the final RT full screen window?
Or something like that…