Given a thing X you know you want to do in the future, when should you do it?

That's a hard question that requires some level of precision.

Precision that is likely both expensive and also misleading.

But an easier question is, "should I do X now or in the future?"

That's a much easier question to answer.

Often the answer is simply "not yet", you can punt it down the road, and stop thinking about it for now.