The long fight to make Apple's iMessage compatible with all devices has raged with little to show for it. But Google (de facto leader of the charge) and other mobile operators are now leveraging the European Union's Digital Market Act (DMA), according to the Financial Times. The law, which goes into effect in 2024, requires that "gatekeepers" not favor their own systems or limit third parties from interoperating within them. Gatekeepers are any company that meets specific financial and usage qualifications, including Google's parent company Alphabet, Apple, Samsung and others.
My understanding is that while the US and some others quickly moved to unlimited texting plans, many European countries continued to charge per text so apps like WhatsApp become the defacto replacement
In France we got unlimited texts at about the same time as unlimited data.
I don't think a plan with unlimited data and limited texts ever existed.
In Sweden I can't remember the last time I saw a plan that didn't include unlimited sms and calls. Only thing marketed is data. However if you really search for them I guess it's still possible to buy something else somewhere.