It's not a solution to all of Takeout's problems, but if you just care about backing up email within a Google Workspace, check out Got Your Back: https://githu

It's not a solution to all of Takeout's problems, but if you just care about backing up email within a Google Workspace, check out Got Your Back: https://github.com/GAM-team/got-your-back https://github.com/GAM-team/got-your-back It is, I believe, written by a Google employee. It's a really great CLI tool that allows you to dump mailboxes to disk as a bunch of text files. You can also restore them to another account. Lots of flexibility as well. I gave up on Takeout and Google's own Data Migration tool, both of which I found just too flaky and inconsistent - my experience was not dissimilar to that in the OP.