Earlier quoted context omitted.
> there is no deposit account ACATS equivalent There sort of is: wires and EFTs. The simple answer may be, for many savers, the spread is irrelevant. If you're saving for a home over a year [1], the difference between earning zero and 80 bps on e.g. $100,000 (quarter of the median home sales price [2]) is no more than $800. If these are your only savings, having them at an institution you know and trust may be worth…
Right now I-bonds are a pretty compelling down payment savings vehicle, at least for your first ~$15k/year, if your timeline is more than one year out.
Regardless it's per individual. So if married everyone make sure to double up!