It seems at some point chromeOptions was replaced by 'goog:ChromeOptions'. Does anyone have an idea on when this was changed? I've found very little documentation on it.
I was running some tests against the Selenium grid version: elgalu/selenium:3.141.59-p41 which uses Chrome 81 and Selenium 3.141.59 and noticed w3c flag was not not being honored until I changed the config to use 'goog:ChromeOptions' instead.