The 60 times a day crash (more specifically the app just froze), took 1 to 2 months to fix and it affected every web app. Users would have to force kill the app and restart.
I'd recommend reading through all the comments to get a really good idea on how severe all of the bugs were: https://open-web-advocacy.org/walled-gardens-report/#ios-saf...
https://open-web-advocacy.org/walled-gardens-report/#safari-...
In 2021, after 10 years of these issues, no progress on important web app features (like push/install prompts), no response from Apple or the Safari/Webkit team, we decided the only method by which Apple would fund Safari properly was to goto governments and regulators to reverse their ban on third party browsers.
Not long after we petitioned regulators Apple started working on push notifications, 12 years after they came out for native.