I had a thought today, wondering if plugins actually did load on the plugins page in WordPress. If they do, I don’t think they should! Plugins should always be manageable from the WordPress Admin. Yeah, maybe a plugin breaks a few admin pages, but it shouldn’t, at least, break the plugins page, that way it can be navigated to manually, and plugins can be deactivated, managed, etc.
Same for themes. I’m going to do some investigating.