Re: What is this rant actually about?
" An alternative, of course, might be to introduce PAYG for landline." ... They did ... and withdrew it again. Look up BT Pay&Call https://www.bt.com/pricing/current/Exch_Lines_boo/1612_d0e1.htm#1612-d0e1
FWIW, we're currently with BT for internet & line rental, but only because it worked out cheapest last time round for our pattern of usage. It's been passed around various companies over the years. Our primary telephone number IS a "landline" number, but it was ported to A&A some time back and now comes in via VoIP, ringing on the house phones AND on our mobiles. We never use the number associated with the physical line... that only ever gets wrong numbers.