We’ve had Dyson’s and all of them lost suction after a couple of years and eventually despite having their repair service out they ended up in the skip. I’ve also used Hoover and Electrolux etc and they were more reliable than the Dysons.
For the past 6 years we have used a Henry. It’s still got incredible suction, you can even hoover up dirt in the garage with it, it’s got all the attachments you could ever need for the car or small spaces and replacement parts are easy to come by (not that we have ever needed them). Henry can service every vac they have ever made (just like naim do) and it’s not unusual to find 30 year old models still in daily use.
There’s a reason why they are the vacuum of choice in airports, hospitals etc and that is that they just work and are totally reliable.
They’re still made in the UK in Somerset with the HQ in Camberley and owned by the same guy that set the company up in 1969. They now offer cordless as well as corded vacs:
You can even get them in naim green! and the prices are very reasonable.
No affiliation with the company, just a happy customer but I won’t buy any other vac.
PS interesting article on the company here - they seem to be the naim audio of vacuum cleaners! https://www.telegraph.co.uk/business/private-equity-investment/henry-the-hoover/