Cool! I think there are a lot of ease-of-use aspects to this being a desktop app instead of a webapp requiring deployment.

I think there are a lot of advantages to a local app:

1. richer interface 2. lower latency 3. no need to share sensitive data with a third party

1 & 2 are less of an issue than they used to be, but 3 is still a major issue.

That's all true. I think the advantages to a server-based app are 1. available from any device, 2. able to operate on your behalf at any time

There's a reasonable place for both. Getting data and operating on it is a pretty fundamental need!

Yes, a web-based solution is going to be better for some use cases. But if you have a load of sensitive data files to wrangle then a desktop app is hard to beat.