Earlier quoted context omitted.
It's probably more cost effective to negotiate a long-term max price with your cloud provider with a force majeure clause.
Unless you’re crazy enough to work with GCP, the “my cloud provider is going to lock me in and then raise prices” doesn’t happen. AWS has only raised prices in a few very obscure cases ever. One of which is putting a price on HEAD requests in S3 (?). AWS already gives long term price discounts/guaranteed prices for reserve pricing and Big customers already have negotiated contracts.
The size of the savings you can negotiate is a function of how locked in you are. A big customer will get discounts well beyond reserved instances, in response for (usually) committing to increase their expenditure above where it is.
The better your competing offer, the better the negotiating position. And while Amazon hasn’t gotten more expensive per se, it’s certainly not gotten cheaper.