Both of these Google outages made it to the HN frontpage:
https://news.ycombinator.com/item?id=20077421
https://news.ycombinator.com/item?id=20338263
Both of these AWS outages made it to the HN frontpage (and neither are listed in that AWS timeline):
Good correction: the outages do happen at a fixed rate. Regarding GCP, I only see a couple events that have lasted more than 8 hours, not sure how many of those affect more than one subsystem.
Google's own status page[1] list near 100 incidents in the past 365 days, only one of which ended on HN frontpage.
[0] https://en.wikipedia.org/wiki/Timeline_of_Amazon_Web_Service...
[1] https://status.cloud.google.com/summary