This is a great essay (and tool). I wanted to highlight one passage:
"All that's really necessary [to make an opt-in search index] is to create an ActivityPub instance and have users follow a specific account in order to opt-in. It even simplifies the system's architecture, because indexable content will get sent straight to the index instance, with no spiders required."
While you say this has been talked about before, *I* hadn't seen it so clearly expressed, so thanks!
#Fediverse #search