Bad choices of X happen but, they tend to get ironed out well so when it comes time to pick an X, there's no great reason to spend too much time deliberating over it.
There's a difference between "not [...] to spend too much time" and not spending time at all.
(Maybe, though, it is about time for a new task list and "vision sketch" of a complete GNU. For example, an effort could be made to assemble a candidate FSF/GNU distribution with the expectation that the effort will fail, but will yield a list of what work remains to be done.)
That would be interesting.