I may or may not have realized something related to In Space with Markiplier.
Engineer!Mark said that the only other person he trusted the most was the Captain.
Engineer!Mark also built the warp core.
Now, with this in mind, recall when the Captain first found the warp core.
The warp core itself trusted the Captain to resolve the time-space paradox we got ourselves into.
If you think about it, this could be Engineer!Mark's statement of trusting the Captain still ringing true despite his distrust to the Captain before engaging the warp core.
Even if he thought that the Captain was the reason why the events of ISWM happened, he still subconciously trusted the Captain enough to resolve everything.
It wasn't just our hopeful persistence that saved the time-space continuum and The Invincible — it was Engineer!Mark's faith in the Captain that helped in resolving everything.
Markiplier may say this is about "the illusion of choice," but this is just as much about deep relationships that lead to a deep level of trust.
Honestly, this is one of the most beautiful things that I have ever realized about this.