Document alternatives

[jayqi]

We should document alternatives to cloudpathlib.

The only one I've seen is https://github.com/liormizr/s3path

One common way this is done is to have an ## Alternatives section towards the bottom of the README with a bullet list. If we want to elaborate, we can link to an Alternatives page in the docs website that has more discussion.

EDIT: Here's another https://github.com/justindujardin/pathy

[jayqi]

Probably makes sense to also document non-pathlib-interface alternatives:

• fsspec-family of projects
• smart_open : only implements open for reading/writing

[cgebbe]

Any update on this? The recent cookiecutter-data-science-template 2.0 now recommends cloudpathlib: https://drivendata.co/blog/ccds-v2

However, having positive experience with the very versatile fsspec (in particular s3fs, but knowing that e.g. gcsfs exists as well), I have trouble identifying why I should switch. The pathlib-like interface seems nice - are there any other features?