The overview is good, and the outline is good, but ultimately the problem is that the returns on big investments in DX are only really seen for companies at absolutely massive scale. There are far more companies that just burned through money getting a "nice" dev environment than there are companies that put a FTE or more into DX and saw worthwhile results.
It's worth some time for teams to think critically about their own tooling, but the trend towards DX as an end in and of itself has been a drag on many teams.