it's just painfully slow to get into orbit once the boosters are seperated
It's a space game, not "I need to get home before dinner or my mum's gonna spank me in the arse so hard I have to sit on my baby sister's arm float for the rest of the week"
Point is, never rush a space mission. I usually code a launch in KSP in KoS, launch, and go take a crap. Or in SFS, I play the game while I take a crap, or when I do homework. Just launch, point the rocket at a specific angle of attack, and do some math problems.