OAuth tokens used in automation tools will continue to work. Entering in username & password through auth, to automate an OAuth flow (or any other traditionally manual flow) will stop working. Breaks some puppeteer scripts too - but those have been getting flaky for a while now.
Yes I would agree with that, except that if you change a password you know the scripts will fail, but if an OAuth token gets invalidated by the system and not you, then it will fail without warning.
And if your password gets reset by the system and not you, same story.
What makes you say oauth tokens are any less robust? Aside from the fact they usually have an expiration attached to them, there's not much difference.