The multiregional idea is what I learned in grad school, many years ago. I have been partial to it ever since.
I didn't study any of this in school but, I'm partial to it also. After all the reading I do, it just seems the most logical explanation.
You must know that DNA studies does not support this 'take' on things though.
I thought Mungo Man was the big break in the case until the date proved to be much earlier than originally thought.
Fossil Challenge To Out Of Africa Theory (Mungo Man)