I would have to disagree.
Dyson are now fitting better quality Panasonic motors. How many DC07's have you seen with burnt out motors? Thousands.
How many DC25's have you seen with blown up motors? Hardly many. That's because the DC07 used a YDK motor and the DC25's all have Panasonic motors. The DC01's had pretty reliable motors though! They are currently using the YDK motors again in their DC41's and DC39's etc. They would go back to Panasonic if there's a lot of problems, but there's not many burnt out DC41's and DC39's compared to the number of DC08's etc because the radial root cyclone works better.
Even though the DC01 had a reliable motor, there was a reminder everytime the bin is removed. You can't miss it. On the DC04, 07/14/33 it doesn't remind you as well as the DC01. The DC01 machines were maintained by everyone! When I get a DC01 they either have washable filters in them or they have a filter which isn't as dirty as the ones in a typical raw DC07 (early model- the derooted ones hardly need the filter cleaning!)
Furthermore, the new Dysons have flaxible plastic. Yeah it's flexible and I hated it but I have been using my DC41 all the time and we have got used to it. It's not so bad! The plastic will NOT snap. We vacuum like twice a day everyday for a minimum of 10-15 mins.
Looking at the pre motor filter, there's only a bit of fine dust (a thin layer of it) which is because of the fantastic mesh screen and radial root cyclone technology. Not much hair goes onto the filter. Dyson did a great job fitting the mesh screen. It's like having a single cyclone vax where you HAVE to clean the filter (tap it/brush it etc) cos it's the bin and people would normally rinse it at their discretion. They don't need tho though if they don't overfill it!
I would be more confident to drop a Dyson DC75 Cinetic dorn a flight of stairs than any Dyson DC01-DC14 with an exception of the post 2005 models of any Dyson. That's because they stopped using the fragile fadable ABS plastic and now they use plastic that is shock absorbing. I would rather have a flexible plastic vacuum than one that acts like glass (If it bends slightly, it breaks).
The DC04 feels solid, yes. The wand can snap though if knocked over a handful of times, the carry handle is prone to breaking and the plastic overall is the same everywhere except for the brush housing, the bin insert, the bin and the valve pipe clips.
How many DC14's do you see that's broken physically vs a Dyson DC01-DC07? (Except the late derooted models with the reinforced handle).
The DC14 is pretty strong, but you do get the odd riped hose or broken tool (Tools are strong anyways and body's only break if something extreme happens) because the material used is MUCH MUCH MUCH better. The wands on DC14's are made of good plastic. I can bend it and it won't break. You don't drive with care when using a vacuum cleaner. People vacuum fast. Dyson mollycode their vacuums in their testing centre.
As for plastic wands, that's alright. I got used to it aswell. The wands will NOT dent so throw it around all you want. I wouln't be throwing a metal Dysonw and because it would't be telescopic anymore. The plastic is strong anyways and I have NEVER ever seen one snapped yet.
If you ask me, Dyson have improved. They have gone from one of the worst performing vacuumks (DC01/02/03) to one of the best vacuums you can get worldwide. I still like the old models but I just like both old and new. People have their opinions.