Some thoughts after reading:
People for Whom One Cellphone Isn't Enough
Many use a second mobile device to keep photos and text messages private
I've always been able to have a "buffer" between work and my personal life...
Sometimes, I never had a home phone (landline)...didn't feel as if I needed one. When I did have a landline, I had an answering machine. Then, an answering service...no phone. Next, a pager...no phone. After, (for emergencies) I had a voice pager...no phone.
At one radio station broadcasting company, we had great remote pickup units (RPUs) at the studios and in the vehicles. I had a portable scanner that monitored the frequencies, and used that as a voice pager.
When a company felt they needed to be able to contact me "at any time", they provided a pager or phone (with service) for me. One company purchased a vehicle for me to use while I was employed.
Because they wanted to promote their companies as much as possible, others purchased clothing with their logos on it for me to wear. There was a time when my wardrobe was mostly comprised of shirts and coats from radio stations on them...and it was a very rare occasion when I wasn't wearing them. I know one guy who, because his company provides his, can always be seen in his uniforms from a public transportation company. I know a woman I remember regularly seeing in her United States Postal Service uniforms.
I have always had one computer designated for my professional activities. There are a lot of great reasons to do that. One is, if you are unable to use your "personal" computer, the odds are in your favor that the one designated for business might not have been exposed to things that may have compromised the computer you use for personal activities (malware, software and hardware instability, etcetera).
I don't own any phones now...I don't need one: all of my communications are done via various internet services.