Being unreachable except by land line is very nice.You obviously don't have an answering machine/voicemail
Actually an answering machine is built into my land line phone. I also had a stand alone answering machines in the late 80s (that one used tape), another in the 90’s and Noughties.
They suffice.
Someday soon after 5G rolls out and they can finally tell, at least when combined with surveillance cameras, I expect there will be an app to alert people to folks not carrying phones and not using apps related to Covid etc.