[ArloL]

My take on it is that it boils down to the profession being so young. Since it's so young we have a lot of young developers ( < 10 years experience). Programming is an inherently complex task [0]. Couple that with Not-Invented-Here and favoritism of barely working solutions (meaning by businesses: [1]) and as a result you get extremely fluctuating stacks. Every piece of code written by others was never written with care [2] - that is the assumption at least because more often that not it's true. Everyone in their own right thinks that only their code works well and has some special properties but in the end you face the exact same problems: problems of design rather than implementation.

[0] http://worrydream.com/refs/Brooks-NoSilverBullet.pdf

[1] https://www.cs.utexas.edu/users/EWD/transcriptions/EWD10xx/E...: the business community, which, having been sold to the idea that computers would make life easier, is mentally unprepared to accept that they only solve the easier problems at the price of creating much harder ones

[2] See why Martin Fowler stresses Technical Excellence basically every time he get's on stage: https://www.youtube.com/watch?v=G_y2pNj0zZg