Been without a land line for 5 years. No concern about “emergencies”. Just as long as those that need to contact you in the case of an emergency have your cell number.
When I visit my mother, I’m amazed at how often her phone rings with “spam” calls. I have had maybe two or three cold calls over the last 5 years (and I think 2 of those were from candidates during the election).
Sign you mother up for the do not call list. Cuts the annoying calls by 80% and there is a benefit of reducing the chance that your mom get’s scammed.