As long as there is a visible prompt or other explanation informing users that they must install IndieAuth to user Micropub or Microsub, I’m in favour of removing the fallback.
David Shanske (david.shanske.com)Thinking about the necessity of maintaining IndieAuth code in the Micropub plugin and now the Yarns Microsub plugin for WordPress. I wanted to put out to any WordPress user for some input. The IndieAuth plugin creates an IndieAuth endpoint inside your WordPress installation. This means that you logi...
For what it’s worth, I think IndieAuth is reliable enough that supporting external auth is no longer needed. If there are cases where people have trouble getting the IndieAuth plugin to work for them, then a fallback is handy. However I think you’re correct that the added work (and complexibity) of maintaining secondary authorization methods across multiple plugins is not ideal.