I have a Eureka small cannister from the early 1980s and they still sell the bags and filters for it and it still works. I don't use it that much because the motors on the newer models are much more powerful. We have a Dyson Stick and it's great for portability and also a Hoover upright. These two are relatively new and bagless. The best way to clean it is to empty it out outside, in a dumpster if you have one available. There are cannister vacuum cleaners available with bags like the Miele. There are other brands which have bags but you usually find them at specialty stores. We have a local Sew and Vac store that sells vacuum cleaners from a few companies that use bags.
The mass merchandising places sell models that are all bagless in my experience.
The reason why most are bagless today is that's what people want.
I do not get my hands dirty when emptying out the canister on our bagless models. I just push a button, the bottom cover falls down and the dirt falls out. When done, I just push the bottom cover back into the bottom. It swings down from a hinge.
Miele canister vacuums with vacuum bags combine exceptional cleaning performance with unique user convenience and high-end Miele quality.
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