If only it worked... https://i.imgur.com/FKFa2l7.png

I probably could try to bisect if there is a specific type of data that prevents Takeout on my account, but I haven't bothered as I think I have all the important data otherwise backed up.

I had the same issue and bisecting it helped to find the culprit (although I don't remember which one it was right now)

If you live in the EU just send them a GDPR request, they'll have to give you a dump within some timeframe. If their bots redirect you to their download UI, contact your regulator.

I do. Seems like that would not be too much work, so I think I'll do just that. I'll try Takeout one more time, and after it fails (it takes a few days) I'll submit a request via their data access request form.

Several Takeouts may work: a gmail-only archive, a photos-from-only-last-year archive, ...

You have a tiny window to download a huge archive and you can't restart the download.

In theory it's great in practice you don't have access to it.

You can now link the takeout to another cloud provider (e.g. Dropbox or Microsoft OneDrive). And configure the takeout to take place every two month (for up to 6 times).

So you just need to configure the takeout once a year and you'll automatically receive a backup once every two month.

This is nice, thanks for pointing it out. It's a shame though you can't export to something like S3.

I just turned it on and they can now transfer the files to Dropbox or another storage provider.

This helps mitigate some risk but if you're using OAuth or rely on receiving future emails via your @gmail.com account you're still out of luck regardless

This. We need to create an email portability system (like there currently is with mobile phone numbers)

Just use a custom domain.