In my experience, the only OS that (usually) suspends when told to do so is mac. Linux and Windows both struggle with it depending on your hardware.

There have been instances where I have seen such behaviour , but it has almost always boiled down to ISP hardware in a very specific location. Multiple different devices in different locations? Most likely user error

It is cheap as long as you don’t need to restore your data. Downloading data from S3 costs a lot. OP asked about 56TB of storage, for which data retrieval would cost about 4.7k

https://aws.amazon.com/s3/pricing/ under data transfer