This has been in the works for years, so telecoms have had plenty of time to get ready. They've also been offering much better roaming rates the past few years within Europe.
I think the main problem is that the prices telecom providers have to pay for roaming data will be higher, than the selling price to customers, resulting in losses for telecom providers. The only way to counter that is increasing domestic prices.
Brussels makes rules, but doesnt understand the market and industry.
> I think the main problem is that the prices telecom providers have to pay for roaming data will be higher, than the selling price to customers
Most of the telecoms won't be paying at all, except as an independent exercise; they're nearly all owned by one of about five companies (or else are MVNOs who are already accustomed to paying for data etc for their customers).
> the prices telecom providers have to pay for roaming data will be higher, than the selling price to customers
Aren't those regulated by this as well? I remember the first EU data roaming regulations targeted only what the operators charged each other rather than what they charged the customers, so there's precedent at least.
Brussels makes rules, but doesnt understand the market and industry.