This is NOT intended to represent a reservation I have about using the Falcon ending shot. This is such a nerdy thing to say that it would have rightfully been shouted down by people if this had been in the movie.
But…
The Falcon leaping right into hyperspace within a few seconds of taking off makes Han’s efforts to escape from Mos Eisley in ANH seem overly cautionary. (Doesn’t seem like entering hyperspace from within an atmosphere or planet’s gravity would normally be a good idea.)
BUT, it’s a perfect visual ending for the story. Just felt obliged to throw a neckbeard comment in for devil’s advocacy.
“From inside the atmosphere, is that even possible?”
“I never ask that question until after I’ve tried it.”
In this case I wouldn’t sweat the details since it’s actually in character for Han’s ship at this point. And as was said above, the limiting factor in the Mos Eisley escape was the Hyperspace calculation, something that isn’t at issue here.