Given the research that you cited, I have updated my probability estimate – that Conscientiousness is indeed rigid, higher from my original estimate of 75%. Wikipedia provides very accommodating definitions of Conscientiousness, inclusive of many behaviors such as being efficient and systematic, elements such as self-discipline and thoroughness, aspects of industriousness such as productivity and work ethic, and finally a strong association with procrastination.

The following are popular posts that try to understand and promote ways in which we can optimize some of the multiple facets of Conscientiousness listed above :

Scientific Self-Help: The State of Our Knowledge

My Algorithm for Beating Procrastination

Ugh fields

Defeating Ugh Fields In Practice

Anti-Akrasia Technique: Structured Procrastination

If it is not obvious by now, the following questions have me deeply conflicted:

• Is it a waste of time for most, to invest into these sort of posts, because Conscientiousness is rigid?

• If these sort of posts are not a waste of time, and you can optimize certain facets of Conscientiousness via the many methods provided, then is Conscientiousness still rigid?

• Perhaps Conscientiousness is boost-able, but on the low end? Perhaps the efficacy of these posts are over estimated?