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.
C’mon Hal
This is Star Wars - it’s space fantasy, not cold hard science fiction ala Blade Runner or even Star Trek
It’s ok for romanticism to override logic and even low level continuity. That’s why Star Wars has never bogged itself down in explaining it’s science and technology so that it’s not burdened by it.
Plus we’ve seen an in atmosphere jump in Rogue One, when the U Wing escaped Jeddah.
The drama there wasn’t the risk of aerodynamic forces but not having plotted a course in the navicomputer.
Similar to Han trying to evade the Star Destroyers after an emergency take off.
In both situations, there was no pre-planning or luxury of time to pre-load any coordinates, as escape was the priority and everyone’s actions were under duress.
It’s not unfair to imagine that in this instance, Rey has comfortably and leisurely already plotted her return journey so can just hit the jump as and when she fancies?