Indeed, AWS is still king. I doubt GCP or Azure would have anywhere near the capacity to handle all of the AWS customers. You're talking orders of magnitude, maybe 1000x? more compute power required - it's a different scale.
Judging by the Hacker News comments, it's google that has more capabilities than AWS.
If you follow comments about both, there are recurring ones of people who order 5000-15000 cores on Google for short computing intensive tasks whereas AWS didn't let them have thousandS. That forced them to switch.
I find that hard to believe.... 15000 cores is only 1000 16 core serversand my company has no problem with allocating those (300 per AZ) on a monthly basis, using them for a couple days and returning them.
If you follow comments about both, there are recurring ones of people who order 5000-15000 cores on Google for short computing intensive tasks whereas AWS didn't let them have thousandS. That forced them to switch.