I use budgeting apps on a daily basis, and I'll just share my personal feedback: I'm absolutely not downloading ~3 gigs for a budget app. Everything I need to "ask" the app is already available to me in the form of reports, charts, and tables. I don't really have many open-ended questions about my budget because anything important to track is already handled deterministically.

Also yes, it's local but the data you're importing is already with a private organization on the cloud. In that sense, having a local copy of it does not really do anything for me in terms of privacy etc.

As I said, I use budgeting apps daily (one for personal use (self-made), another for business (very old freenium era software that has not failed me in the last 5+ years of self-hosting it)) and I do not see any need for generative AI in that workflow from my pov. YMMV