How will they explain the de-evolution of technology between the prequels and Alien?

Rating: 4/10 (26 September 2017)

There are so many armchair critics and wannabe cinema experts here dishing out their drivel on why they think the CGI looks horrible or that Mr. Scott is unable to direct a movie. I won't waste your time with such nonsensical garbage.
However, I would like to ask the filmmakers how they are going to explain the drastic 18 year de-evolution of technology between all of the pretty holograms and colorful touch screens of the Covenant (and all human ships in Prometheus) and the archaic keyboards, green computer screens and DOS-like operating systems of the Nostromo. ???? Anyone?
I mean, according to the lore of the Alien universe on Xenopedia, the events in Prometheus take place in the year 2093. Eleven years later, in 2104, the Conventant is 7 years away from its destination (probably about 3 years into its mission) when disaster strikes. Which means that the ships in these two scenarios had to have been built before 2104. However, the Nostromo was constructed in the year 2101... obviously AFTER the Convenant, considering the immense size of the colonist cargo ship which must have taken several years to build then stock with supplies, colonists, etc. And yet the Nostromo is equipped with computer technology that seems to be 20 to 30 years older. Please explain...
And you are NOT ALLOWED to use the BS excuse that Lucas used to explain the difference between the pretty ships of the prequels and pieces of junk in the originals. Remember, there was only about a 19 year time lapse between episodes 3 and 4 and his excuse, though it may be sort of logical, was extremely thin.
SPOILER AHEAD.... And by the way, why didn't David just allow his alien to kill the remaining 2 crew members in the end and then take over the ship? Why the whole deception of letting them think he was Walter to the point of helping them kill it and then putting them back to sleep? That would have been a much more sinister and horrific ending than the out-dated "twist ending" that we all saw coming. Hire some real writers for a change instead of following the formula for garbage storytelling. I'm a screenwriter looking for work, let me take a crack at it.