Comment by 8fingerlouie 3 hours ago
There's a reason i specifically mentioned finance, where the end and start of a month is a lot more busy than the middle of the month, as in factor 10+.
People receive paychecks, pay bills, buy stuff, with holidays (christmas, x-mas, etc) being even busier.
Load does not even out, and when you have 3 million customers or more, the load is not really insignificant. Nor can you just delay it, or rely on eventual consistency.
The actual hardware (or virtual these days) is not the problem, but getting the 5000-10000 services properly connected with auditing, credentials and more is more trouble than most people expect.
Finance is a heavily regulated industry, so there’s a LOT of compliance that needs to happen, like segregation of duty, traceability, accountability, and other ilities.
Yes, it would probably cost less to run on Hetzner (provided their ISO audits are approved by financial authorities), but dynamically spinning up and down servers would cost more.
You also need fallback plans (regulated industry, critical infrastructure, etc).
It has literally taken years to get AWS and Azure approved in EU.
Anything that wants to adhere to GDPR should still be very careful, if not outright avoid, AWS and Azure. At most one could use an EU-isolated offspring of them, otherwise one runs into the insanity of US laws. The fact that many businesses don't care doesn't make it right.