I am transitioning my base from normal stations to ltn stations and I want to know how many trains I should have. Do I need to add a new train for every requester station or will less work without any issues

I have a world on 0.17. When 1.0 releases will I be able to upgrade my world to 1.0. Also are there any changes or has anything been balanced that would be a problem for the factory.

Will that command disable steam achievements?

Im trying to use nilaus's jump start base blueprint but I keep finding inserters I have forgotten to place. Is there a way to view all the parts you havent placed?