@dalias @SheamusPatt @anon_opin
In UK risk is more the machine being attacked with cordless power tools to extract the cash (or uprooted altogether with heavy plant and processed elsewhere) than an armed blag on the person taking away the cash (this kind of crime is relatively rare nowadays due to less use of cash and better security procedures and CCTV/surveillance)
I'd be happy with a choice between card and cash (coin/banknote readers aren't that reliable, again due to greater security procedures which can create false positives on valid coins/notes) but whats happening in some areas is the machine is defective or altogether absent, and you are forced to use a parking app (which is only "cheaper" to the Council because its harvesting your data to pay for the service)