>>imtrin+(OP)
this ignores just how competitive these services have become and how much competition there is in this marketplace. Anything that allows a company to balance user experience with cost of hardware will be evaluated. The fact is this is super common because even though RAM is super cheap, at scale, these things add up. If you as a provider don't have to spend 120K on RAM and can use that on more CPUs or something else, it can mean having a competitive edge over the provider that
does have to spend that 120K.