EndFPTP subreddit
Subreddit discussing all proposals to replace FPTP voting.
Link: https://www.reddit.com/r/EndFPTP/
Note that when looking at deleted comments and posts (or checking to see if there are deleted comments in a post), one can replace the "reddit" part of the url with "removeddit" to see the deleted content. For example, with https://www.reddit.com/r/EndFPTP/comments/fjsvv5/_/fkp5q20, this can be replaced with https://www.removeddit.com/r/EndFPTP/comments/fjsvv5/_/fkp5q20 to see the comment.
In addition, [1] can be used to find deleted and non-deleted comments.