If there is a software dark age, it will continue until hardware stops changing so much. Experience is worth a lot in software, but if hardware was stable it would be worth much more. We have solved problems that keep having to be re-solved because the hardware allows a new approach.
A good example - I bet modern graphics cards and simple what that does to neural nets are going to basically erase a lot of former truths about text search, image interpretation and when it is appropriate to use either. And another - rapid upticks in internet/mobile availability reshaped what was true about the web 10 years ago.
It is hard to build well & to last in such shifting environment. Low quality, fast solutions have an edge. In time the wheel will turn. There will be a sudden turning point where spending 5 years on really ironing out bugs and performance tuning starts to make a big difference.
In short, any problems have nothing to do with modelling techniques or the approach taken by software practitioners.