First: I can still hear reasonably well on the Landline phone AND it has the capability of connecting with blue tooth so if you have a hearing aid with classic blue tooth, you can use it on that phone too.
1 The biggest reason I have a Landline - - actually a VOIP - - is because in any disaster (storms, earthquakes etc) it gives me 2 different ways to possibly communicate. Cell towers go down, get over loaded, my landline may still work.
2 I also have a Captel phone on that line which I find unbelievably useful when I have to talk to “tech support” in India!!!
3 I have a Google Voice number which rings both my cell and my VOIP line. I have never given the VOIP number to ANYONE. If ONLY that line rings it is junk and I do not answer. That is the line that gets the robo calls and I just do not answer them. The number I give out to businesses . . . is my Google Voice Number and friends have the cell number.
4 I have Amazon Echo Dot’s in multiple locations and the Echo Connect device which plugs into the land line and allows me to make telephone calls through Alexa. I am 75 years old, live alone and have had Osteoporosis for many years. That is my “emergency call” system instead of wearing a medical alert button that cost me $30/mo and would only call 911!!! If I fall and cannot get up, I can use Alexa to call a friend or neighbor or 911 if that is necessary.