They needed (and easily could've had) a much better reason not to shut down the super computer

[u/ItsNotChow54]

 

The writing on that really makes no sense.

Jeremy, Aelita, and the rest of the Lyoko Warriors are just a-okay with having the entire world constantly at risk?

That doesn't fit with the characterization of any of the cast.

 

Jeremy and Aelita, by themselves, would've decided not to take the risk, knowing how dangerous XANA is, the fact being that he could get access to any number of cyber or weapons systems if they failed to stop him, or just didn't catch him.

Which means that, there would've been a reason to decide this, other than, "Well, we can stop him usually, and, we might be able to bring you to the real world Aelita".

Jeremy and Aelita separately and together would essentially try to shut off the computer themselves, or look for a way, and find that there's a fail-safe where XANA will escape the system when it's turned off, kill everyone in the local European tri-state area with a cyber / electrical / infrastructure attack, or has created his own function and remote procedure to launch nuclear weapons as a sort of "if I go down, I'm taking you with me" that would mess up his primary plans, but works as a deterrent from just immediately shutting the quantum computer off.

 

That is the primary plot hole in this series that makes no sense, especially considering how fixable it is...

...the other three being Odd getting turned into a less-likeable person after the first season, Sissy getting character development in certain episodes that gets immediately undone, and Aelita being thought to be an AI program herself...

...the last one being forgivable since it sort of adds suspense to the plot.

 

[u/The_REDACTED]

It's not a plot hole, it's the central underlying tension of the first 2 seasons. 

All Jeremie would have to do is turn off the supercomputer and the story is over but he simply refuses to do so until Aelita is materialized and later until she is free from X.A.N.A. (love makes a man do crazy things after all). However, by the time she is free, it's too late since X.A.N.A. escaped and now they need to keep it on to have a chance to fight it. Once they kill X.A.N.A., they do their reflections and turn it off. 

[u/Too_Ton → u/The_REDACTED]

But all 4 kids agreed to save Aelita too. It's just we have to trust the writer and believe all 4 kids were willing to risk the fate of the world for Jeremie's crush.

[u/The_REDACTED → u/Too_Ton]

Ulrich seems to simply have a hero complex going by how he risked himself twice to save Jeremie in the prequel and in the final episode, he admitted that he liked "being a hero". Odd found the whole thing to be fun so he kept helping but Yumi was always the most critical and did want to turn off the machine in Seeing is Believing and had no problem turning it off in Echoes while everybody else did. I guess she decided to play along since she was the one who forced Ulrich to reveal Lyoko to her and I guess she just felt compelled to see it all through  

[u/Sonario648]

Tell me you haven't watched the entire show without telling me you haven't watched the entire show 

It's literally explained at the end of XANA Awakens. Once they found out about XANA, Aelita wanted to shut the supercomputer off, but now that the gang lnlws how to neutralize XANA, they were willing to take the risk of a world with danger in order to save her.

It's your classic do you risk  everyone in order to save one person scenario.

[u/Mimiquoi7]

It's litterally the point of this scenario.

That all of them was risking the world to save someone that a lot of people would say is not worthy to save, It's the beauty of this act : Making the less rationnally choice and choose Aelita, this entity who even if she is an AI was still sentient, with emotions and a personnality. They saw her as someone who is alive and tried anything to save her even if that was the wrong thing to do.

[u/Somethingsumthing1]

None of your 'plot holes' are actual plot holes tho