That's why my phone SIM is still not a subscription but rather I manually buy credit each month. The price is even lower than subscription and benefits exceed it, shitloads of Gb and minutes. If I'll use roaming I'll pay for a more expensive credit that month but I have piece of mind I won't be charged thousands of euro at the end of the month.

Like telecom providers of course cloud providers could have metered service billed under "get only as much as you paid" policy but it's obviously they totally and in bad faith don't want that.