It was pretty wild when I logged into one of my other bank accounts and it said I could not use Zelle with that account because I already had Zelle linked to a different bank account. So I had to unlink it from the other account first. Isn't it common for people to have more than one bank account, and wasn't this the case when Zelle was developed, relatively recently? Why did this use case not cross their mind when they developed it?