You cannot usefully change/review architecture decisions in 1 year. The point of architecture is to make the hard decisions that you will regret getting wrong in the future to try to get them right now (often without enough information to make them). If you decide to make a free for all an architecture will emerge that is a mess that you cannot change.

Architecture should not be "we have always done it like this". If you don't write down why though it will become that. Often there are good reasons that things have always been done like that - those reasons may or may not still be valid but if you don't know what they are it is hard to evaluation. More than once I've seen someone rethink a "we have always done it like that" and discover the hard way why they always did it that way.

I've never seen a company with a good way to write down why they do things though. When someone even tries nobody reads those documents.