As an aside and for my own curiosity, where do you think accounting software is going in the future? (It isn't my industry but I hear occasional mentions of it more frequently than I would expect)
Lot's of vertical integration & automation, with the depth depending on business size.
There are only a couple of "ground truth streams" flowing into a businesses accounting. Making sure you own as many as possible of them goes a long way towards automating the tasks necessary to properly model the business and do the accounting.
I was referring to the entry barriers here because being able to offer for example a business bank account, credit card etc. with proper APIs to trigger payments and receive transactions in realtime still carriers regulatory hurdles in most countries that are not negligible, even if it got cheaper in most countries. Same goes for loans, factoring...
Lot's of areas to earn money with, pretty much everyone in that space has it in their slidedeck as a revenue channel somewhere down the road.
I could further elaborate but at the end of the day it's moving offtopic.
I'd say predicting the future is less hard than arriving there.