One other note for those who might have missed it:
February, 2020: Enforcement rollout for Chrome 80 Stable: The SameSite-by-default and SameSite=None-requires-Secure behaviors will begin rolling out to Chrome 80 Stable for an initial limited population starting the week of February 17, 2020, excluding the US President’s Day holiday on Monday. We will be closely monitoring and evaluating ecosystem impact from this initial limited phase through gradually increasing rollouts.
Chrome 80: There is a 50% chance that the new SameSite rules are active in your browser, ONLY if you are using Chrome 80 Canary, Dev, or Beta. Upon the release of Chrome 80 Stable, the new SameSite behavior will be rolled out to Chrome 80 Stable users as specified in the timeline above. Chrome 80 users on other channels (Canary, Dev, Beta) will also receive the new SameSite behavior at that time.
SameSite Updates - The Chromium Projects
So hopefully it won't be immediately impactful unless you're running beta, dev or canary.
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