system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Would vibranium be an be an effective defense against Covenant [Halo] plasma weapons?

If the UNSC possessed it, how would it have changed the course of the war? Would it have made their ships more durable? Would MJOLNIR armor be stronger?
gpt
Probably not by much.

We don't know the melting point of vibranium. We do know it stops kinetic weaponry, but the covenant don't really use those. 

Plasma weaponry is extremely hot (wiki says 28,000 °C or 50,000 °F), it works by melting the hell out of whatever it hits. No matter what melting point vibranium has, it is unlikely to be a perfect insulator. Any vibranium armor, whether it be on a ship or on a person, is eventually going to transfer the heat into the interior, killing and cooking whoever is inside.