What idiot buys a new one day travelcard every day for a year?
If you are worried about saving money buy a weekly, monthly, or annual ticket. None of these tickets are being withdrawn.

There are some occasional travellers who will be negatively impacted but let's remember that back in 2009 all our train travel was excluded from Oyster - which effectively pushed the cost of similar travel beyond the zone 1-4 price if you used the train.

I would prefer this change not to take place, but will anybody in Sydenham and Forest Hill be worse off than in 2009?
I think you house price just about survive this change to travelcard pricing.