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Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] What would've happened if Obi-Wan went with Mace Windu to confront Palpatine?

Windu wasn't able to convince Anakin that Palpatine needed to be executed, resulting in Windu's death. Could Obi-Wan have stopped both Mace Windu from getting killed and Anakin from turning? What if Yoda had been present in this specific scenario?

Sorry if this needs a spoiler, I doubt the Showdown on Coruscant is new enough to be spoiled by a grand majority of people.
gpt
Obi-Wan is the only person who could have helped Anakin at this point. Even after fully committing himself to the dark side and becoming Darth Vader Anakin says to Obi-Wan "Don't make me kill you".

Sheev wasn't stupid. He recommended Anakin for the Utapau mission because he knows it would guarantee his exclusion. He knows Obi-Wan would be sent because of prior encounters with Grievous, and he knows he'll be sent alone because Grievous has been escaping for 3 years now.

He deliberately separated them. If Obi-Wan was on Coruscant, he'd be brought to confront Sidious. His words to Anakin would reassure him more than Mace. He'd last in a fight against Sidious because of his fighting style. Anakin would still come to the Chancellor's office, but seeing Obi-Wan being blasted with lightning would have a very different effect than Mace Windu.

If Obi-Wan were there, Anakin would have fulfilled his destiny 23 years earlier.