Do you still know anyone (an adult) who doesn’t own a cell phone?

Yes I know a couple of people who refuse to use/own/have mobile phones or a tablet with calling ability. When most of the Telstra copper network was forcibly handed to NBN Co over the last handful of years almost all fixed-line phone and internet services provided by normal telco's over copper went away so a huge number of residences with a fixed-line phone either ditched them or had to get an equivalent VoIP phone if they wanted to keep the service.

I dumped fixed line for phone in mid-2020 when the NBN 'equivalence' period for my area expired and now only use mobiles. It's good in some ways and really shit in others, because with fixed line you can 'disconnect' from being 'always contactable'. Not so easy to do that with mobiles.