Clunky, annoying, inconvenient, borderline useless. Cash only place is a good way to lose my business, especially since the odds I have cash on me are close to zero.
Also one of the most expensive options for me as a consumer since I have to use my time to find an ABM, pay the ABM fee, etc.
Also one of the most expensive options for me as a merchant, since I have to physically go to a bank and jump through hoops to deposit it.