I'm not the guy you're responding to but for me, GnuCash has helped me identify a number of subscriptions I don't use anymore, that I have then cancelled. It al

I'm not the guy you're responding to but for me, GnuCash has helped me identify a number of subscriptions I don't use anymore, that I have then cancelled. It also helped me identify a direct debit that I had forgotten to cancel when I moved house. So there have been tangible savings. Of course you could argue that I could have discovered these things just by reviewing my bank statements regularly, but that's most of the work of importing them into GnuCash anyway, and it's easier to spot these things when you are actively categorising your transactions. It's also just a helpful way to track the growth of your net worth over time when you have multiple accounts, investments, etc. You may or may not take action based on what you find but it's good to know.