Two years ago Google said they would extend the amount of historical data in their Search Console from 90 days to 1 year. If you've looked at the Search Console at any time during those past two years, you'll know that hasn't happened.
Zineb from Google reaffirmed on Twitter that it is still happening but they have no timeline for when to expect the change. Though this means we still have to wait, it is nice to know the plans are theoretically still being put into action and have not slipped through the cracks.
Any predictions for when we will finally get the update?