I remember the point in my career when I moved from a cranky old .NET company, where we handled millions of users from a single cabinent's worth of beefy servers, to a cloud based shop where we used every cloud buzzword tech under the sun (but mainly everything was containerized node microservices).
I shudder thinking back to the eldritch horrors I saw on the cloud billing side, and the funny thing is, we were constantly fighting performance problems.