The worst part is that certain banks won't let you link an account that Plaid claims is supported based upon the routing number/account number.

So for example when I attempted to link based upon routing/account number at Simple, it told me I can't continue because I should hand over my account information for the other bank to Plaid instead.

I've done it, and then immediately changed my account info. So yes, technically Plaid has my historical data, but at least they won't get it going forward. It really sucks though, because it locks my money into a singular bank otherwise.