Is Delta Air Lines Beginning the 'Enshitification' of International Business Class with New Basic Fares?
(www.paddleyourownkanoo.com)
They still do the upgrade bids, but be careful as your ticket restrictions will remain the same. For example, if you don't have checked bags included in your economy class ticket, you won't have any for the business class upgrade, either.
I would be in favor of the loss of a carry on bag if it meant tickets would be cheaper, but unfortunately the opposite is true.
It's a crying shame that all the European carriers are gradually all becoming LCCs (Lufthansa is by far the worst in this regard).