Earlier quoted context omitted.
Are you assuming MW aggregation, and that’s how you’re amortizing CT cost?
No, I'm just using the fact that in a Mimmblewimble blockchain, the initial block download doesn't include any data about spent outputs. Neither the outputs themselves nor their rangeproofs. That's the beauty of MW. You could call that historical aggregation, but normally when people talk about aggregation (as I assume you do) it refers to aggregating transactions before they're included in a block. In other CT block…
In my experience when people talk about on-chain scalability, they mean transactions per second of real-time validation. Maybe I’m wrong but I don’t think anyone in this thread was talking about IBD / validation of historical data.