I worry about it about as much as I worry about getting extradited to Thailand to face court for violating a law insulting the Thai king. I am unaware of even a single person of my nationality who has been extradited to Europe to face some kind of GDPR tribunal.

If I were running a business that had any operations or clients whatsoever in Europe my opinion on this topic would be different (in terms of legal liability to the corporation, and necessity of compliance to ensure ongoing revenue from European customers, etc), but I am not.

The GDPR doesn't try to remove anything from the global internet. You're free to not serve your site in the EU. Texas is free to block sites in Texas. But Texas trying to remove the ability of Europeans to access European websites is a completely different matter.