Of course they matter. Ideally the decision that was made 6 months ago under the conditions/restraints was the right one back then. Since then circumstances mi

Of course they matter. Ideally the decision that was made 6 months ago under the conditions/restraints was the right one back then. Since then circumstances might have changed that would result in a different decision 6 months ago if you had known. Only if you have a record of some sort (ideally with background information and not just the time of the decision) people will be able to understand and re-evaluate the past. Money and time was invested since then and the decision to keep the course or to change again should consider the history of the decision.