Lindhaus - LB4 Superleggera L-ion Digital Pro

Its the sheer amount of energy (continuous energy) used by a vacuum. It is why the battery only gets \~10min of use in 'boost modes' where IMO approach the power of good corded units. Some of the higher end units (like the lindhaus cordless unit) use bigger batteries to help compensate for this, but they still aren't the same. Maybe some day (well I bet it will happen) battery tech will allow cordless units to be as powerful or maybe even more so.

Miele, Sebo, Henry, Lindhaus. Shark and Dyson are garbage. Check out r/vacuumcleaners

The best vacuum money can buy is a Vorwerk, Lindhaus, or Sebo E3. Whether they're the type of vacuum you want is another story.

Versamatic and recently switched to Lindhaus

Best comes down to the user preference and circumstance - floor types and other needs. However, some things for me are non negotiable; durability, ease of maintenance, repair and use and of course, performance - not just out of the box, but in 5 or 10 years. When it comes to performance, when it comes to carpets especially, suction is important, but it isn't the most important. Airflow and agitation are more important, to beat and flow the air through the carpet fibres, so the suction can take it away. The old Hoover advert - it beats as it sweeps as it clean a remains true and they had 300 watts. Hard floors generally don't require huge amounts of suction. Creating a good seal can also work, but that means snow ploughing large items, so usually you can't have one without the other, but some vacs have a retractable flap to allow large items in but keep the seal. These are usually on cordless vacs with lower power. Well designed corded vacuums with a powered brush bar is the starting point. You have to decide whether you prefer an upright or a canister, though personally I think a canister is more versatile. I don't understand the issues people have with using canisters, it's just a vacuum! That means you should buy a bagged vacuum. The Miele's have great suction and amazing filtration. The performance is superb BUT they are not as reliable as Sebo. The bags are more expensive, the brush rolls are not as easy to remove hair off or generally maintain and on the C3 range at least, there is an issue where the bags can fail to seat correctly and the dirt can fill the chamber around the bag, possibly getting into the motor. I think Sebo's are better options. In day to day use, the performance is essentially the same, the bags are bigger and they are easier to maintain. Furthermore, they all use the same power head, the ET-1, so the performance from that defines the pick up performance essentially. Any vacuum that uses it will have the same at the head performance, including the upright Felix/Dart. The brush roll can be removed to cut off hair and clean it, it can even be put in the dishwasher! The E Series is the sweet spot, but the D Series is fantastic but big. That would be my choice. Lindhaus also make excellent vacuums but they are harder to find and harder to get the spares for, but if you can, they shouldn't be overlooked.

That is all absolutely true. I've given it thought before, myself. Logically, it doesn't make any sense. I think it's the law of motion thing or something. The more I have to do to begin the vacuuming process, the more likely I am to procreate it. Dealing with cords has always been one of those deterrents for me. So, if I have a cordless (presumably bagless) vacuum handy, I'm much more likely to get my lazy self over to the vacuum, flip the switch, vacuum a bit, then put it back. Every so many times I use it, the canister and filters need to be cleaned. By this time I'm already in motion, so Newton helps a great deal to keep the momentum going. I know. On paper, they're a lot more work. Tons more. But, for some of us, I guess it's just psychological. I went full on bagged vacuums for a long time, and I still sing their praises for all the areas they exel. But, I still use my cheap cordless more often.

I have a Meile, a Lindhaus, and a $100 no name Amazon cordless vacuum. Guess which one I use most. The cordless. Every day. Multiple times, some days. I know, I've got to empty the canister, but not every time, and it's not that hard. For periodic, hopefully weekly, deep vacuuming, I pull out the other guys. I had a carpet cleaning business for a lot of years, and people would frequently ask me what the best vacuum was. I told them, every time, the one you'll use the most. So many times, I would go into homes where they owned expensive fancy vacuums that clearly never saw the light of day.

My thoughts are buy a refurbished Sebo, Lindhaus, or Miele, a good amount cheaper but the vacuums are of such high quality that they can be rebuild and still last 20 years