Especially for savings. Using a fintech for day to day banking has its uses (I'm a customer of Revolut and N26) and they blow traditional banks out of the water in terms of features and usability (at one point my traditional bank was blocking "suspicious" card transactions from "abroad"... Ireland and Luxemburg, stuff like Amazon and Uber).

But savings are mostly fire and forget, unless you decide to play an active part which is not for everyone and most people shouldn't.