Quote Originally Posted by bishblaize View Post
what may have been a perfectly good project plan 6 months ago is irrelevant now, and all that time you spent planning becomes wasted.
I don't think any time spent planning is wasted. If you needed to plan to get the item off your mind, even as a someday maybe thing and the plan changes at least you've gotten some additional experience in planning so it's not really wasted time.

Plus how many things really change that much?

I know my life is a lot different but I have plans on projects that go back 25 or more years and they are still perfectly valid. We've even managed to get around to finishing some of those long term someday maybe projects using those plans over the last 10 years.