While Kirby and the new Kirby Avalir are great vacuum cleaners and the new Avalir may be successful especially in America.
In the UK and probably parts of Europe people are leading more and more busy life styles be it family orientated or socially and spending a lot of time cleaning is not high on the list as it used to be years ago. That's not saying some don't spend some amount of time cleaning. People want quick, fast, effective cleaning that takes little or no time to keep theirs homes clean and tidy with minimal effort. Something that is lightweight too. That's why cordless vacuums have become more popular of late in the UK. They want convience, people don't want to be using their big vacuum cleaners with several attachments they have got to be changing to do a task, well not all the time. I noticed this reading online reviews UK users have posted. Some say their full size vacuum hasn't been used since using a cordless vacuum or a lighter corded vacuum. While they may or may not be as effective as some full size vacuums some will say, that's what people in the UK seem to want, light easy to use, cheap to maintain and run and quick and effective. Plus the bagless craze in the UK is still at large too.
That's not saying complete homecare systems like Kirby don't have there place.
Only time will tell as usual.