I don’t use my work laptop as my personal one, i have a personal gaming PC and tablet. If i didn’t have my tablet i might temporarily use the work laptop for personal stuff when travelling, instead of buying a laptop just for that.

Reasons for using the work phone: i don’t need to spend a lot of money duplicating the hardware i already have for free; i don’t need to pay for a phone/data plan to service that second device; i don’t need to carry two phones around (since i need to have the work one anyway).

Any particular reason you have in mind why one should not use their work phone? Or why is this surprising to you? Also not meant disrespectfully, only trying to understand where you are coming from.