Installed BIAB 2021 plus Pak, extra styles 10, free bonus Pak and 49 Pak straight over version 2020.
Running on an Asus i5 laptop with 8gb ram, 256 ssd and UHD graphics.
All music software including Realtracks is on a very fast 256gb microSD card reformatted to NTFS with 16k allocation units in dedicated slot on the laptop to keep USB slots free.
Program startup is indeed slower than 2020 but still only takes 30 seconds or so - there may be lots of entry points for debugging as it is new. This would slow startup.
Styles using Realtracks are mostly loaded in a few seconds as in 2020. Newer complicated styles especially those using solos take up to 30 seconds to load.
Had a couple of crashes when setting up - most to do with audio output. Resorted to the built-in reset to factory defaults twice.
Rendering to save or mp3 produced very bad audio at first but fixed easily after checking settings to match hardware.
Happy chappy now!!!
Garth from Perth, Western Australia
www.perthobservatory.com.auStimulating the public interest in Astronomy and its history