gatsby build is not preserving timestamps of existing files

[msurguy]

From Gatsby code, I see that during gatbsy build command, assets in static folder are copied over to the public folder but their timestamps are not preserved, resulting in all assets in static folder to be re-uploaded again on subsequent deploys.

Specifically I see that fs.copySync command is used here:
https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby/src/utils/get-static-dir.ts#L36

I was wondering why Gatsby developers did not include preserveTimestamps: true parameter to avoid this inefficiency. Here is the documentation of fs.copySync command: https://github.com/jprichardson/node-fs-extra/blob/master/docs/copy-sync.md

Can anyone elaborate on why preserveTimestamps: true should not be included on line 36 of get-static-dir file?