See https://worrydream.com/refs/Brooks_1986_-_No_Silver_Bullet.p...

for a classic analysis. Software has numerous problems that are on the "critical" path, if you say that there are five things, let's just say

  -- requirements elicitation
  -- analysis
  -- implementation
  -- testing
  -- deployment

and each of these takes 20% of the work, you can see a product which eliminate just one phase of this work still leaves 80% of the work undone! So the answer is that to make a revolutionary change you have to speed up everything.

Deploy is interesting, for instance, in the cloud age in that you really could deploy with "just one click" into hosting provided by the vendor, but many organizations would want to be on premise or in the cloud they control which just vastly complicates it all, as every organization does it the "army way", not the right or wrong way. [1]

[1] https://www.quora.com/Is-it-a-thing-in-the-US-Army-to-say-Th...