FYI, those are VOIP lines, not actual land lines.
When we cut the cord we dropped everything except Internet. For the "land line" we ported the number to our T-Mobile account, but without a corresponding device, so the cost is only ten bucks a month. We forward the calls to Mrs. Chandler's cell, which blocks a lot of the "scam" calls.
I'm thinking about porting that number to Google Voice. Then the cost will be $0 per month.
We just call it a landline because it’s not a cellphone & is stationary in one spot in the house. :-) My folks are over 90 so cell phones are not something they are comfortable with. They have Tracfone flip phones to carry for emergencies & can barely use them - usually have to give them a “refresher” course every time they leave the house.