> Given Europe and the UK have had Open Banking for years now, and a universe of apps automatically pulling, categorising and reporting transactions (including many incumbent banking apps) - I'm curios if this is a US-only phenomenon - why would people use decade-old software instead of the latest in banking technology? Any users from Europe or UK?

Maybe the situation is better on the continent, but from living in Ireland and the UK I don't believe this is a solved problem here. Open Banking allows third parties to connect with your bank accounts with your consent but I'm not aware of any (reputable) service that simply gives you an API into your own bank accounts. Would be happy to be corrected on that.

That said, I wouldn't call the entry process entirely manual. GnuCash supports importing transactions in a broad range of formats, including OFX, QIF and CSV with user-defined rules. Yes, you still need to log into your bank/credit card/etc and download statements for import, but personally I don't mind doing that. My workflow is that I spend about half an hour every week logging my transactions in GnuCash. Sometimes I skip a week or two. Yesterday I had to enter a full month of transactions and it took me about an hour (complicated by the fact that I had lots of business expenses).