Now and then it seems a download fails - not because it doesn't exist, just one of those internet things. Even with excellent AWS data to AWS s3.

This is the usual error:

CPLE_OpenFailedError: '/vsicurl/https://sentinel-cogs.s3.us-west-2.amazonaws.com/sentinel-s2-l2a-cogs/22/M/EV/2020/7/S2A_22MEV_20200704_0_L2A/B02.tif' not recognized as a supported file format.

So something where it can retry when it is not a 404?