As per ManhattanBlog:https://www.manhattanprep.com/gmat/forums/as-long-as-vs-so-long-as-t21357.html
The difference in meaning is so subtle, I wouldhighly doubt the GMAT would test the difference. However, "as long as" would probably be more likely to show a time interval whereas "so long as" is more of a condition.
I will sit here as long as (for the amount of time) it takes for you to understand the answer.
I will stop talking so long as (with the understanding
...
The difference in meaning is so subtle, I wouldhighly doubt the GMAT would test the difference. However, "as long as" would probably be more likely to show a time interval whereas "so long as" is more of a condition.
I will sit here as long as (for the amount of time) it takes for you to understand the answer.
I will stop talking so long as (with the understanding
...
