Account aging is a thing. Traditional social media platforms already try and somewhat fail to solve this, with Nostr you have less signals to act on and slower response since it is decentralized.

Got me there, but my core point still stands. You can have multiple wot algorithms with contradictory metrics. Users can decide which they want at a given time. Nothing beats irl with trust, and then general perceived interaction history as a second. I think it would be interesting to have many users all engaging with rotating differing wot metrics over time. You'll likely still have your 1 or 2 degrees of separation, while the users on the periphery of your network will recycle depending on which metric your using.

If you make a map as the sole point of truth, it can also be used by anyone to traverse in. Would be an interesting experiment to see how gamable it is to have rotating & contextual maps. The users don't care how objective the wot is anyway, so long as it effectively filters their experience.