>We've done this, it was called the dark ages and it sucked and we moved past it.

Well, the "dark ages" is now widely considered a misnomer, and that time is seen as an important era development-wise.

But the development was very slow, and it was held back by policy and a stronghold by leaders onto the status-quo.

On the other hand, it was development and stability - in an era where the previous Roman system had collapsed.

Whereas now many argue it's decline and regression in many areas compared to recent past.

No, it is not widely considered to be a misnomer. What are you trying to communicate with this comment?