Except, TFA talks about renting a server rather than running your own infrastructure. ;) Sure, with AWS there is less work to do (if you have the skills to set it up in the first place, or it’s £££ time) but TFA is right in that you get much worse performance per £.
There’s nobody you pay, in your own company, to sit around watching S3 or Lambda or SQS for degradation. That ops service is part of AWS’s job that you pay for through each service’s fee structure.