> The slow pace of change is a feature, not a bug.
To a point. It seems to have ground to a halt.
> The USA has had an uninterrupted system of government since 1789. How many other major countries can say the same?
Quite a few of them can say "we took those good ideas and built on them".
In what sense has it ground to a halt? Eight amendments have been ratified in the past 100 years. I think some people are taking a very short-term view here and lack a historical perspective.
Let's see how those other countries are doing 100 years from now.