Banks as an example of "getting things done" is laughable. Real industry gets things done: manufacturing, construction, healthcare etc. We could do without the massive leech that is the finance sector.
"Real industry" also has quite a hard time getting things done these days. If you look around at the software landscape, you'll notice that "getting things done" is much easier for companies whose software interfaces less with the real world. Banking, government, defense, healthcare etc. are all places where real-life regulation has a trickle-down effect on the actual speed of producing software. The rise of big tech companies as the dominant economic powerhouses of our time is only further evidence that it's easier to just do a lot of things over the internet and even preferred, because the market rewards it. We would do well to figure out how to get stuff done in the real world again.
And that needs skyscrapers and entire financial districts to achieve? This is a tiny fraction of the "work" done by the financial sector. Most of what they do is pointless trading between themselves and sapping the output of the real economy.
The banks' real "product" is trust. You will work an entire month for a "bank transfer" (something you can't even hold, let alone eat or burn) because you believe your landlord will similarly accept a "bank transfer" in exchange for you rent (or, if you have a mortgage, you work an entire month because you believe this means you will be able to continue living in your house unchallenged). This has absolutely nothing to do with what programming languages or paradigms they have in place.
With so many issues and costs that people buy stablecoins to exchange money with smart-contracts that have no substantial guarantee other than the issuer's right to block funds...
