Re: And nothing much will change for 95% of companies
If the EU decides that the new legislation is no longer sufficient to support adequacy then at best companies might have a lot of additional hoops to jump through to do business with EU residents.
A Schrems style situation might even become a Schrems plus. Whilst the consumer rights side of the EU pushes GDPR etc the trading side doesn't really want to avoid doing business with the US and keeps inventing new fig leaves for Schrems to tear down. They might be less inclined to do the same for a country they regard as uncooperative.