Yeah, I sure understand what you're saying, and I am 65. I text; have for some years now. Email. AIM. Captioned phones from the state. Used TTY before that. And the only people in my life who will text on any basis at all? My DH (husband) and DD (daughter)! Everyone else in my age range act like it's such a big bother to text. And they're the same ones who are lousy at emailing or answering emails as well. They want to make phone calls, but not call a special # first (like the Captel requires). So I have lost touch with a lot of friends and extended family because of their "phobia" about texting or Internet.
And then there are the constant battles with my health care and trying to get them to call me back through my IP-Relay phone number, etc. UGH! Because we are Deaf/HOH *we* have to be flexible and go through all this to communicate, but others just don't want to be bothered.
And then there are my older relatives, who can't adapt to the relay operator type conversation (the Go Ahead, etc.) and so I haven't talked to them in years. And they don't snail mail letters, so...I lose touch. 
I'm glad you have customers of all ages that work with you through text. 