I see texting as a way to avoid having an actual conversation with someone. Texting is okay for short communications like "I'll be there at 2pm", but if you're typing several paragraphs in a text on anything more complex its not good enough to replace a conversation.

My sister and brother are both narcissistic, but in different ways. My sister has her MBA, so you know she is the ultimate authority on just about everything. My brother is a lifetime body builder type. They're not bad people, but they need to get over themselves. I'm not impressed by either of them and I know them since dirt. I'm looking for authentic connections but I can't spend enough time with either one to ever get that.

This hits home for me because I think you're probably right.

"They're a product of the time they grew up in. They're Gen X, so they grew up with texting and they tend to be shallow about interactions and they don't value immediacy or authentic connections. They take Jo completely for granted and one day hopefully in the distant future when she is no longer around to plan a holiday dinner, they'll dimly realize what they blew off because it was "boring" and they will then feel the loss."