I don't keep large liquid in my CU, instead that is in higher yeild accounts, but that was true with Chase or BoA as well.
The reliable IT system has to be there, but you might be horrified about the beast of systems (human and computer) that make our banks/ach/transactions/etc function.
I don't worry much about loosing money in the bank due to FDIC/ NCUSIF. I can't audit their internal process so I instead depend on insurance. It kinda removes worry about their IT infra from my mind.
If you are above FDIC value, you should be banking with multiple banks and putting your money to better uses.