Sure, you should be cognizant of what you say online otherwise you'll get smacked with the cancel culture hammer. This is regardless of where you work.
E.g. the last thing you want from your comment about using <new product> early internally are news articles about "What Google plans on doing with <new product>" when you were just trying to give your personal opinion on where the technology might go.
As to the greater point, I want to emphasize that as a human being I want to be careful with how I communicate with others because I care about them not feeling judged, dismissed, othered, or otherwise insulted. The charge that the rules keep changing is overblown; it’s always about respecting people even if you don’t understand or enjoy them.
I know that some might still equate that with “cancel culture” but I can’t help that (and tbh that’s a discussion that we should have over beers and not on the internet).