Enhancement Request
I was working with someone who saw 20 minute launch time because of 90.1 2010 and 2013 libraries were loaded.
Detailed Description
I expected to find the library files were older version of OpenStudio but they were up to date. Maybe issue is having two libraries open that may have duplicate object names. (I confirmed some kind of negative interaction. 2010 or 2013 on their own results in OS App load time of about 20 seconds. Both together results in just under 7 minutes to launch)
Possible Implementation
Maybe warn users about loading multiple non-default libraries, or break into smaller building type and template specific files.
I generally just have users use the DOE or DEER version of space type and construction set wizard measures which will build on the fly for specified building type, space type, and template/vintage combination.