The average life of a US bank deposit is ~4.5 years (varies by product type)

The average life of a stablecoin deposit on a borrow-lend protocol is <1 month (there is basically just one product type)
Interestingly, deposits on Ethereum are significantly longer lived, but still >50% decay rate by month 1.
This should make intuitive sense: switching costs are higher between banks, and banks offer a wide range of adjacent services, while DeFi protocols are usually one-trick ponies.
That bundle of services, combined with ease of transacting with the balance, gives bank deposits a premium - users demand very little interest.
It should be top of mind to all borrow-lend protocols how to expand their offerings beyond overnight, overcollateralized lending to build a premium on their own deposits.
It should also be obvious that US banks and DeFi/stablecoins are not substitutes