I think we need to have a discussion about when a proposed change should be an alias/implication versus a bulk change.
Something should be clear. Tag aliases and implications don't exist to create a beautiful hierarchy of data and relationships. They exist to make search easier. If a proposed change doesn't make search easier, then it doesn't serve much purpose.
There is a cost to adding a bunch of aliases and implications. Each additional one makes it harder to reason what the consequences are when another one is added. Reverts are hard and messy. Implications also add a space overhead to tag changes.
Whenever I have to review a proposal I have a hard time. A lack of discussion doesn't mean it's valid. And a lot of discussion typically means there's some ambiguity that's hard for me to suss out. So I feel I need to do something to raise the requirements to approve a change.
I've become dubious of aliases where the first tag has fewer than 100 posts. In my opinion these should just be changed with a bulk update. The alias is only useful when the from tag is being used constantly, either in tagging or searches. This is unlikely to happen with small count tags. And establishing a canonical tag early on means that people will just naturally use it.
I have conflicted feelings about implications that only exist to form arbitrary group tags. These group tags are only useful when someone searches for them. If two people use a group tag with 30k posts, then that group tag is a waste of space.
So I'm going to propose the following requirements:
1. For mass updates, the consequent tag must have a fleshed out wiki page. There are no minimum post count requirements for approval.
2. For alias and implication requests, the antecedent tag needs at least 100 posts. The consequent tag must have a fleshed out wiki page.
3. For alias and implication requests to be approved, there must be at least two other users who approve of it. If you can't muster that much interest, then the change probably doesn't have much utility.
I may implement a system to track tag searches that end up with no results to better data mine for potential aliases and implications but for now I'd like to start with this.
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