Probably still around 10 million users, down from a high of 80 million in 2012.https://en.wikipedia.org/wiki/BlackBerry#User_base
I never used a Blackberry, but I still use a Samsung cell phone I bought in 2011, which has a physical keyboard and does everything a smartphone does except run apps. It's very compact, about 2-in. wide by 4.5-in. long, and I take it with me almost every time I leave the house, it has held up very well and the battery only needs charging about once a week.
Blackberry phones were known for their high levels of security; I'm pretty sure my phone is hacker-proof as well.