You never know. 20 years ago I didn’t think my mom would ever figure out how to use email, let alone spend free time on an online social media platform. Nothing is forever.
I had heard of someone setting up their Friendica Forum with SMS and email add-ons (maybe they used IFTT? I’m not sure) so that their family members could participate in the “group chat” in the preferred way of each individual. They had indicated that eventually most of them switched to Friendica so that they could get the full experience. I’ve never done it though.