Kit Bashing was first started by buying real model kits and making new things out of all the various parts. Like having legos from a bunch of kits and making something new.
As Blender makes it's new asset manager system, Kit Bashing will become easier and more fun.
Several plugins already have this functionality such as the kit ops plugin. (very fun and fast to make for example sci fi props)
https://www.creativeshrimp.com/cycles-x-speed-test.html Cycles x is faster than cycles. Yay.
If you are getting the dreaded cpu out of memory error, try this first:
Why do you want to do Computer Graphics?
People have a yearn to create. Be it for art's sake and to make money, or to make a statement.
CG GURU talks about Ai and good jobs and what skills will always be in demand to help future proof your choices.