Yes, but it's a prepay card we're talking about. You can't have a prepay paper ticket, so I guess the point is needing to buy a ticket in advance because there's no way to validate the card on the train (or outside the zones).
I don't see how this is really an argument. You cannot buy/top-up/use an Oyster outside of the zones (or indeed buy or top-up at most NR stations within the zones... - unless this changed?).
So if you're commencing a journey from outside the zones and wish to use Oyster in the zones then you must check and top-up the time before. I can see many people getting caught out in the first few months, arriving at say Surbiton with a balance of less than £1, thinking they can top-up...
As I said, such a card doesn't really help with splitting tickets either. Acceptance of Oyster on NR really is solely for the benefit of Londoners (who 99% of the time remain in the zones and don't have to worry about such points as we mention here), more than anything else. As I said, if you wish to split tickets and are coming from outside the zones, paper tickets are a lot less hassle to think about and are no more expensive.
There is also no 'pre-pay' issue to think about. Yes, you can buy the ticket in advance or when you travel. Granted, that means a ticket office queue to think about, but when you are buying another ticket anyway...
And if you're doing a fair bit of travelling around without exiting the system, then Oyster really isn't going to be that friendly to you when you take 8 hours to do Charing Cross to Embankment. Of course, the obvious remedy here is to touch out and in again every so often but that is an inconvenience you don't have with paper tickets.
More a case of before an off-peak cap wasn't a Travelcard, because you couldn't use it on National Rail. But now you can use it, a cap is the same thing.
True, and I suspect it is a combination of factors. I don't believe a 50p saving previously equated to the use of unlimited National Rail journeys within the zones. One of the points with Oyster was it is also meant to be cheaper... Although, as you said, now it is effectively an electronic travelcard it may be an agreement with ATOC to have the fares the same.
I had somewhat naively assumed that the card readers on SWT stations were related to the Oyster role out. Are SWT planning their own electronic ticketing system then?
Yes, it has been in the pipeline for a while now, and I believe it is a franchise commitment. A trial took place earlier this year for commuters on the Staines to Windsor and Eton Riverside branch. The aim is to trial in more places before a systemwide roll-out meaning they can be a lot more flexible with tickets than previously - e.g. 5 in 7 day seasons (cheaper than 7 day) I think was one possibility mentioned.