Comment by PaulDavisThe1st

The page you linked says there were 48.68 billion SMS in 2020. Averaged across the population, that's on the order of 800-900 messages per person per year. Even if the actual SMS usage demographics skews older (quite likely), it's still likely that most people send at least one text per day, maybe more.

Given that the original claim was that "no-one uses SMS anymore", I think that's still demonstrably false. Your milder claim - "rare to find anyone under 60 who uses SMS as their primary messaging system" - seems likely to be true.