GDPR has a few good ideas about encrypting data buried in its ~170 articles, but most companies were doing that already because data breaches are expensive.
The rest of GDPR is about (essentially) trade protectionism: they want you using European servers to store and process data. They want that data in easy reach of other EU laws and enforcement agencies.
I would go so far as to say that most startups which don't do 100% of their compute within European borders are likely non-compliant with GDPR by the law as written.
Edit: To be clear, I would have no problem with the level of trade protectionism if it only applied to companies that do $X million of business in the EU. That's how every other data residency law is set up. If you want to force series E+ companies through weird hurdles, have fun.
What personal data do the startups require that's hard to rein?
Digital Services Act - great
Chat control and all the other pushes for increased surveillance - terrible, don't these guys know history?
There is no need to applaud/reject them all.
> I assume GDPR is very popular here despite making software development a huge pain
If it creates a huge pain, then the data probably wasn't handled in a respectful way in the first place.