Actually not very impressed with that post regarding Miele's so called claim of components lasting 20 years and the reason I'm not impressed is that Miele don't fit a 20 year guarantee on their components - oh yes they say that their machines are designed to last a long life time - but their floor heads haven't lasted that well in my hands/7 to 8 years at the most and the springs start to go on the pedals. Do Miele offer free replacement?
No, they suggest its a consumable/wear item that has to be replaced - yet the Video links and the hype suggests the floor heads are made to withstand longevity. Telescopic ratchets on metal tubes start to fail after five or so many years too. The only "wear" items that have lasted with me is the simple bent plastic handle and the cleaning tools! 20 year quality longevity components? Nah, sorry.
As for stresses on cords, well a lot of brands like SEBO don't fit furiously fast rewinds to allow stress to happen. One reason alone to why the C series vacuums don't have as fast a pull system as the K series with its daft pull release mechanism. I can see SEBO'S theory in fitting a pull/pull system that eliminates a button that can break - I know from my own old Miele S571 that a new push button had to be replaced on the original machine and Miele charged me for that!
When BOSCH can fit a 12 metre cable (39 to 40ft) onto the large canister (BSGL5000) vacuums, there's really nothing to stop Miele from doing the same.
Miele do not make long cords because they don't want sales of other products in the range to suffer. Period. It has nothing to do with stresses or whatever else any one chooses to point out. Its a simple case of marketing. You only need to look at previous Miele canisters and weigh up the slight increments of metres that have increased over the years.