GitHub Issue from Russ Cox with a February 26 update comment about opting in by default with a link of his reasoning on his blog.
https://media.hachyderm.io/media_attachments/files/111/776/120/160/023/780/original/060ae51f4459d7b9.jpg
@phiofx @orsinium @avlap2 I don't know, it seems pretty explicit
Opt in by default, and a lot of pros and cons are written in his blog post.
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