As someone who wrote a budgeting app, historical data > 1 year is a lot less useful than most folks realize. I would say at least 80% of folks never look back further than 6 months. It's not even worthwhile for comparing YoY as your lifestyle, the economy, etc change so much.

I ended up adding per-transaction opt-out roll up functionality for this reason, effectively squashing transactions into monthly and yearly budget summary transaction. Saved a ton of space with little loss of granularity.