1) Cookie notifications are not required by GDPR. They are required by national level implementation of the ePrivacy Directive.

2) Data portability is already a requirement under GDPR Article 20. The problem is that it requires competing services to work together to create interoperable systems or formats. That's really unlikely to happen without addition regulatory action mandating that competitors cooperate.

People will always gloss over privacy policies, privacy tools, and privacy disclosures. The reality is that people are concerned about privacy, but not concerned enough to make any changes. People concerned about the environment still get on planes and fly all over the world.