Well I think NZ and Switzerland have the advantage that their satellite platforms aren’t area restricted and both have a lot more compatible devices. So I think people areas with poor reception (but those that still wouldn’t get the full VAST service in OZ) are more likely to go the DTH route (since you can hide a dish more easily than a big terrestrial antenna for fringe receotion).
In NZ since the sat broadcast is FTA you can just use any cheap set top box from China or a lot of modern TVs have satellite tuners integrated too. In Switzerland you do need to get a decription card, but with a CI module you again can use it again pretty much in any modern TV with sat tuner.
Plus Switzerlands DTT was at best a berebones service to begin with. You only got the public channels from your own language region and the main channels from the two other regions (so if you were in the German part you’d get the German channels and the main channel in Fench and Italian). No commercial channels on DTT at all and only SD as well. Meanwhile with DTH you get all the public TV channels in HD (with about 10 mbps MPEG4 and DD5.1 AC3 as well), plus the main comemrcial channel and you have the ability to get channels from Germany, France, Italy and the UK with a multi-sat-setup. I wouldn’t think twice if I had to choose there.