> in the article for appending events to user files How are you appending to files from Lambda? EFS? > With Kinesis, we just use the file ID as the sharding k

> in the article for appending events to user files How are you appending to files from Lambda? EFS? > With Kinesis, we just use the file ID as the sharding key, so no more than a single lambda ever works on a single user Is there a risk of "heavy" users causing hot shards?