> I use S3 for backing store and have for many years.  I recommend it. You
> have to pay, but Amazon doesn't pull the plug on you without warning.  I
> currently have 186 GB and I pay about US $4 per month.

That's cheap. But I'm wary of using anything other than Linux servers.
Scheme.org should be platform-neutral as much as possible so that we can
move things around if/when the need arises. A Linux server can be hosted
identically in countless places, and we can always find someone who
knows how to admin it. Git is good for the same reason - it's a
vendor-neutral standard.

As a separate but related issue, Scheme has a significant GNU presence
and they tend to regard Big Tech companies with suspicion. Not sure
whether this applies to AWS and/or Linux servers hosted there.