Most of these requirements are perfectly reasonable and i don’t see any that are technologically difficult to implement unless you underlying business model relies on selling user data without regards, in which case, good riddance.

I feel like the "GDPR doesn't affect you unless you sell data" line is the new version of "surveillance doesn't affect you unless you've got something to hide". Every time GDPR is mentioned in a HN thread you see dozens+ of comments asking for clarifications on how to "get around" GDPR issues for legitimate uses. The point is you don't have to be a bad guy to be affected by GDPR and need to spend time+money on not only complying (auditing and implementing systems), but also verifying you're actually compliant with an expert, and the smaller you are the more relative time you have to spend on this work yourself (instead of e.g. hiring lawyers+developers to just do it for you).

The GDPR requirements are not that hard to follow. Yes, it takes time to audit your tech stack and website, but small companies can certainly get it to work without paying thousands of dollars. Tools like this one (It was just $49 bucks) help you get started. https://appsumo.com/gdpr-tracker/