I have also been using my private number for over 25 years, which I have never changed. 16 years ago, I got an official one on which I activated viber, whatsapp and other communication tools due to work needs. so my private number is left without innovations, I only use it for calls and SMS (and authentication on all financial and other platforms). don't be fooled by this picture, even though I work with mobile numbers and a bunch of cards every day (and I don't work for an operator, as you might think from the number of cards), I have never changed my number. I have no plans for now. But I once had a project at work, replacing the company's mobile operator network. it was a challenge... more than 2000 colleagues then changed their cards and numbers...
You sure you're not selling sims on the black market for burner phones? 😉