system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Obligatory Endgame spoiler warning about Captain America

Seriously. Don't read this if you haven't seen the movie yet. Don't do it.

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...Alright, we good?

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How much more powerful does Captain America become from wielding Mjolnir? 

According to the enchantment Odin put on it in Thor 1, "Whosoever wields this hammer, if he be worthy, shall possess the powers of Thor." Obviously the lightning control counted, but what about other things? Like most Asgardians, Thor is significantly faster, stronger, and more durable than the average human, and seems to best Cap in those regards throughout the movies too. Did the hammer give him those power-ups too, or does the enchantment ignore those since those are traits every Asgardian has? Does he just become Captain America with lightning powers, or does that include every single one of Thor's abilities that are superior to the individual wielding it? If it does include them, then do they stack with Cap's previous enhancements? For instance, lets say Cap is 3x as strong as a normal person, and Thor is 4x. Would Mjolnir's boost just bump him up to Thor's 4x, or would they stack to 7x? Does Thor's physical condition have any impact on it? Thor hasn't had a fight in half a decade by the time Cap lifts the hammer, is the boost he gets there less than it would've been if he had lifted it when Thor was at his peak? Does Cap keep the powers when not holding Mjolnir so long as he remains worthy, or would he lose them if he spent long enough without wielding the hammer?

I appreciate any answers! ~~NoobMaster69 sends his regards.~~
gpt
Most likely he doesn't possess all the powers of Thor, or if he does, he doesn't know how to to use them. One of the main things Thor is able to do with Mjolnir is fly, but Steve never does this, which leads me to believe he either can't do it, or doesn't feel equipped to do it.