Counterpoint:
I don't want backups for IM. I don't want my counter-parties to have backups for e2e encrypted IM. I don't want IM to last. Why record every conversation on your permanent record? It's nuts.
For me, having a searchable record of everything said defeats the whole purpose if IM and e2e encryption. I'm sure the NSA like it.
Reasonable people may differ on it.