i think you need to sit down and write down what your landline does that your cellphone does not do.
weigh the pros and cons and find out whether to end your relationship with your land line or to fight for it.
PS: i bet everyone reaches you on your cellphone.
Think about it. if someone asked you for your number, just out of impulse, which one do you give out first.
another idea is to take your landline and use it as your office phone.