I just bought a high $$ V15 as a replacement that supposedly wasn't working. The V7 attachments fit the the new V15 which has a battery that does the whole house easily (1500 sq ft- retirement vacation home)
The first thing I do with a new house is pull out the rugs and put in wood floors. So easily to clean AND I can't stand to see nothing but a clean, freshly mopped floor.
A new EBAY V7 battery has twice the original amp-hour battery so it is used as a corner/hard to get to vacuum.
The point is the battery operated appliances are fine with high $$ batteries BUT NEVER AS GOOD AS THE plug in machines for hard jobs like wall to wall carpet. Ditto gas vs. Electric cars.
Completely agree with your post. And one of the reasons I so complain is that the high $$ battery part is a show stopper for me. I’m old. I’m used to a cord.
Heck, back in the day I used a cord powered electric lawn mower. It had lots of power And my mowing pattern was designed around managing the cord. Worked great.
That being said, my cordless drill is WAY better than one with a cord. I have two relatively cheap batteries, so even when building my 20x40 deck I never ran out of power. While using one battery the other was charging. And managing a cord around that would have been a serious mess.