Peter Andrews wrote:

Wired phone system, yes. When you are in bed and fire breaks out downstairs
and trips your power supply your bedside DECT phone is simply an ornament!

I have a perfectly good mobile phone for just such an emergency.
Besides, I would have to extend your argument to placing a wired
extension phone next to the beds of everyone in the house who might
have to call 999 and so that's at least 3 upstairs. I'm quite happy to
have one wired phone downstairs.

--
"Have cursor, will curse."