Fine by me. If they want a better experience, I have almost every messaging app on the Dutch market bridged to my Matrix server so I don't care, they'll just have to live with the lack of features if they want to chat with me (or install something like Signal).
I don't care about RCS and other ISP standards that exist to squeeze more money out of texting. I'll use Telegram/Signal/WhatsApp calling before I'll use my phone app because my subscription doesn't include free minutes (and I barely call anyway) so I've gotten the benefits of tech like WiFi calling through VoLTE for years before ISPs bothered sending their VoLTE profiles to my phone.