My principal and strongly-felt emotion on the matter - & I'm already lucky enough to have caught a 25-31 PC+, just - is that like me, there will be many people out there in the UK who may 'discover' the phenomenon that is quality, affordable sub-bass, that is SVS - and then will not be able to get one of the models that makes the most sense - a cylinder. The entire selling-point of the cylinder was that it's the same high-quality bass - but cheaper to achieve and therefore buy in to. To my mind - the cylinders captured the spirit of the SVS mission much better - to place quality bass in normal peoples' homes - through serious affordability. I am surprised therefore that the cylinders aren't available yet - but as already mentioned - who knows - the boxes may be the more popular in fact - and there may be issues to do with authorising the cylinders for distribution.
So - SVS owners, with no intention of upgrading - can most certainly still have strong feelings about the unavailability issue - not least in having to explain to people that they've 'sold' the cylinder to - that they can't be had any more - at least not in the foreseeable.
Just my penny's-worth.