> Even though you aren’t writing the 3P code yourself, by including it in your project you are committed to understanding it—and refreshing that understanding if you want to upgrade it.

This is a nice thought, but I suspect hardly anyone who uses a framework or library really understands it, or makes the commitment to try.

Obviously, a subset of really talented users eventually learn to understand the framework, but most are at its mercy.

Even then, you can't study every possible framework before choosing one to master - there are too many, and the cost of understanding the foreign code is simply too high.

So I suspect that in general, people try frameworks by taking a leap of faith, and then, sometimes, make the effort to actually understand it later - if and when it becomes necessary.