
How times change! The definition of 'Slow to startup'

Now it is Seconds instead of Minutes (remember when programs loaded/ran from floppies?) .
FWIW Calibre 6.25 x64 on
i7-4790 W10 (not W11 compliant) 8G Ram Simple SSD with Library on 2T rotating rust
Dual 1920x1080 monitors
Start up a count of 8 (~ seconds) Lots of entries and ...
FWIW one of the Libraries on Quick switch is a Network share and will wake that PC when I start Calibre (YES, I know about Network shares. I PULL (Copy to Library) from that Intake PC without issue for years. being careful Calibre is not running on that Library. OTOH Trying to Push

YMMV)