Idk about cordless specifically, but the $400 Samsung I had a few years ago was the worst vacuum I’ve ever had. Temperamental, and one of the houses cracked in less than 6 months. Went back and bought another $70 Walmart Bissell that lasted 7 years, after my previous one went 8.
I have heard nothing but great things about Miele.
But then how are you supposed to subjugate them???