> However, some users had been reporting issues related to third-party cookies and a few other minor problems. Recently, oeffectively running a 'DROP TABLE' on 400GB of Firestore data ended up costing $2,000
This doesn't sound like an issue with Firebase Auth per se. You can still use the auth and move your storage to some other mechanism (one friend working on another project is using Firbase Auth with Supabase backend because he couldn't get Supabase auth to work with Claude generating most of his code).
In your case, depending on the document size vs number of documents, it might have been more economical to queue the deletions so that each day, you use exactly up to the free limit (20k deletes per day) and delete it over a number of days if there were no other constraints.
In your case, depending on the document size vs number of documents, it might have been more economical to queue the deletions so that each day, you use exactly up to the free limit (20k deletes per day) and delete it over a number of days if there were no other constraints.