Idk if KSP 1 runs on the same engine as KSP 2, but the main problem with running a craft from Kerbal X on KSP 2 is that all the parts on KSP 1 are not on KSP 2. Those parts are not optimized to run on KSP 2 because they revamped everything. Wings are procedural, fuel tanks arent the same, even pods are completely different. I understand that people are upset with how the game is currently running, but the devs have been very transparent with the fact that if you're not happy with it's current state to wait to buy or play the game. I mean, it's still a beta build. They pushed it to early access so they can optimize the game before it goes to full release.
