Hi there,
I noticed extremely long loading times from the start of P3D to the selection screen in P3D V5 with Orbx addons installed, compared to P3D V4 or to a vanilla installation of P3D V5. This can be five minutes and more, even from a SSD.
This does NOT change if you activate only some entries in the addon.xml.
I tried to change C:\ProgramData\Lockheed Martin\Prepar3D v5\add-ons.cfg from
[DiscoveryPath.0]
PATH=G:\Orbx_Bibliothek\p3dv5
TITLE=Orbx Orb