Theory??

I had read this up till season 1 and then let it marinate, and now I'm rereading and catching up to it (so please no spoiler) and I made a meaningful realization at episode 33.

Sunwoo awakened because he got stuck in a loop during the simulation and relived his parents death. and now Gajun is in a loop, reliving Sunwoo's death.

this has a dual meaning. this might be a clue to how Gajun will (probably) awaken, and how they connect and understand each other. they understand the pain of reliving such a trauma (and the aftermath, such as isolation) and the selfishness of prioritizing oneself. they both had to desensitize towards other people's deaths to protect their sanity.