There's neither the individual or management will to successfully migrate or upgrade at the pace required. Consequently, everything is held together with duct tape and person-hours.
Everything new is the same. Because everything has to be disruptive innovative hockey stick growth bullshit.
Here's a screenshot of tha app for a Swedish bank, Klarna: https://pbs.twimg.com/media/FHXG5bPX0AIC1oe?format=jpg&name=.... They are a bank. They offer credit cards, and fast online credit payments.
And no, "Payments" isn't a list of your payments you've done throught them, that's behind two or three clicks now. It's what you owe them.
They are functional, practical, reasonably intuitive and they keep improving with actual valuable and handy features. Every now and then it still boggles my mind when I use them.
Whenever there is a request for reviews I make sure to mention it. I hope the dev team is paid well because they clearly deserve it.