So how has this changed? Nowadays Google and and Meta are the gatekeepers. The business model has changed from billing the end customer to personal data prostitution. You sell us your private life and we give you "free" services to get even more personal data. Disregarding the ethical aspects: If you look at Google's profits and the money they can happily spend on paying fines to regulators, it's obvious that we have no functioning market economy.
In the old days one could still change between ~3 competing operators and one was typically competing on price. Nowadays you don't really have that option. Maybe every n years when you have to biy a new phone you can choose between Android and Apple, but it's a limited choice.