Capturing thoughts from https://twitter.com/viggy28/status/1530800893842444289
When you are doing major DML changes, other than locks one more thing to keep in mind is replication lag. Especially if you use your replicas in hot standby mode.
When you need to delete most of the records in a massive table, its better to create a new table and just copy the records that you need to preserve. When you need to delete all the records in a massive table, just truncate it instead of deleting them.