We've had the same phone number for 29 year now. It was the landline number that we got when we moved to Illinois in 1987, and we've kept it ever since.
I like having a landline. I know lots of people only have a cellphone now. When we first moved here, cellphones were pretty new. We had a bag-phone in our car for a while. Then when our kids were little, we decided that keeping a landline was critical in case you ever needed to call 911. Only a landline would give your exact location to the 911 dispatcher. Calling 911 on a cellphone got you an operator who would ask what city you lived in. I think 911 on a cellphone has improved since then.
And I found a way to have my landline in my motorhome. What? How do you do that? Well, it's not actually a landline, of course, it just appears to be one, and our setup uses all the normal landline phone handsets that we currently have in our house. The trick to this is something called a "home base". This is a small base unit that takes a cellphone SIM card and creates a connection to a cellular network. But on the back of it, you plug in your normal typical home phone. Or multiple home phones. Or a wireless home phone.
I've been using mine for about a year now, and I have my entire house plugged into it. So all my home phones, and I have a bunch of them - wired and wireless, all work just like they did with a landline. When we move into the motorhome, the homebase will come along and we'll take a few wireless handsets. The nice thing is that you can continue to call us using our normal home phone number, the number we've had for 29 years, and it will find us in our new home, no matter where we are in the US.