“Roads? Where We’re Going, We Don’t Need Roads” (Doc Brown)
I know there are always exceptions, but...
for 20 years I have been talking about fixed / mobile substitution rather than convergence. About 3 months ago we switched off our home landline and use broadband only. We don't have a fixed line anymore because all we got on it are spam calls or the mother-in-law. Anyone wanting to speak to a member of our household would just phone them directly on the mobile rather than going through the inconvenience of phoning the house, only to find the 'wrong' person answering and then saying the person they wanted to speak to wasn't home.
At our company we have never (!) had any landlines (business is 4 years old). We have a non-geographic number that is forwarded to mobile phones, but no landlines or desk phones. I have not missed them.
I won't be shedding any tears for the loss of landlines, given that even our children's grandmother uses a mobile and social media rather than a landline (mainly, anyway).
There will be edge cases where neither works well, but those are few and far between and that is where the focus should lie for analogue landline providers to provide continuity solutions (e.g. very long copper lines).
Businesses have absolutely no excuse as the switch off should not come as any surprise. Businesses (and services) still relying on analogue services only have themselves to blame if they are caught out.
Let progress roll on!