We have accounts in 8 institutions. Some of the reason for that is that Japan uses auto-pay for a lot of things, like utilities. My wife's gym, for example, won't take the money from our main bank here. The cell phone has to be in yet another one. Utils, are in yet another one. So we just transfer the money to those places each month. We are in 4 institutions in the states. The main one, where I keep most funds earmarked for retirement is Schwab. I have been quite pleased with their systems and service. I haven't shifted everything there yets because of the PITA factor, but will do so once we FIRE and move back home. We will keep a 401k at WFC, and a very small checking account at another, for the monthly expenses, transferring once a month from Schwab, but that is just personal preference as to how to keep "growing assets" and expense accounts separate from each other.
Find Joy in the Journey...