I'm not sure how you got "backups are for old people" from my post. My point is that there are two sides to this. Perhaps the data being stored on S3 data _was_ backup data and this engineer was proposing replicating the backup data to GCP. That's probably not the highest priority for most companies. Maybe the OP was right and the other engineers were wrong. Who knows.

In my experience, the kind of person that argues about "arrogant 25 year olds that know everything" is the kind of person that only sees their side of a discussion and refuses to understand the whole context. Maybe OP was in the right, maybe they weren't. But the fact that they are focusing on age and making ad hominem attacks is a red flag in my book.