Most SegWit timelines and Hard Fork flowcharts popping up recently have been either incorrect or incomplete. I took the time to make a better one with the help of two friends of mine.

See the flowchart here.

EDIT: Happy to see this flowchart was published on Bitcoin.com! Link to article.

Tomislav Dugandzic is a moderator at /r/btc and Hampus Sjöberg is active on the bitcoin-dev mailing list and has contributed to the Bitcoin Core-project.

(An earlier version of this flowchart which did not attempt to cover BIP91 early/late activation and false signaling is available in the tweet below.)

Bonus image: