Thanks @CKoerner_WMF - I just successfully left comments on two different Diff posts.

Thanks for the ping. Makes sense to me for a user to be able to bar individual users (other than admins) from their user page and subpages. As I argued in my userspace protection RfC, user pages are not part of the encyclopedia, so the "encyclopedia that anyone can edit" argument for leaving them completely open (by default) really doesn't hold water from my perspective.

In T149445#2755468, @MusikAnimal wrote:

In T149445#2755428, @Funcrunch wrote:

ETA: I should note though that the closer of the RfC specifically said that the consensus was for semi-protection, and this filter option sounds like it would still allow very new accounts to edit (essentially, option 1.5 of the RfC). I do understand that the close is being questioned, and the admin has been pinged for clarification.

The filter is currently set to target unconfirmed users, so would effectively the same as semi-protection

In T149445#2755368, @MusikAnimal wrote:

More advantages to the edit filter over actual semi:

• All disallowed edits are logged, so we're able to track abuse and good-faith attempts
• We can show a customized friendly message, e.g. "Editing of another user's userpage is disallowed to prevent against abuse. If this your userpage, please log in to edit"
• We can alternatively issue a warning then allow them to save, or simply tag the edits. Doesn't have to be disallow.
• We can still allow editing from privileged users who are locally unconfirmed, such as stewards, global-rollbackers, etc. (they may already be able to edit semi-protected pages, not sure)

Note some other wikis are already have similar filters, such as Korean Wikinews

MZMcBride, the RfC specifically included a provision for very new users to be able to edit their own user pages. This was noted by the closer on the talk page. The task to enable that to happen was split off into a separate task, T149484 (not my doing or idea).