Well solo and electron were the full auth cards so under 18's or debit cards bad credit (or people getting cheap Ryanair flights) so I get their point and technically they're still about just under a uniform brand (example mondo card or natwest purple and blue cards).
Switch was fine and was MasterCard equivalent of Visa Delta. Visa dropped delta in favour of Visa (rightly so given everyone called it that anyway) as did dropping electron which was weak.
Switch on the other hand was always well known (in use at hsbc, rbs/natwest, HBOS, Yorkshire & Clydesdale. So strong that even they they rebranded to maestro (the logo which was usually on the back of switch cards anyway) that they joint branded it for a couple of years anyway - and we all no how long maestro lasted in the uk! What MC should have done is gone straight from switch to MC!