What was stopping companies from doing PWAs before? Were they not annoyed at 30% cut? Was the cost of maintaining a separate app for a single platform too small to care about?
Lack of support from Apple's monopoly iPhone browser engine Safari. It didn't even get notification support until 2 years ago. And then there was a recent attempt by Apple to remove PWAs altogether from iOS: https://news.ycombinator.com/item?id=39299007
Apple was and is stopping companies from doing PWAs.
What was stopping companies from doing PWAs before? Were they not annoyed at 30% cut? Was the cost of maintaining a separate app for a single platform too small to care about?