I don't mind using vintage machines to clean with, especially since most clean better & are better quality/better motors & constructed. However, having said that, I use them with modern updates. My Electrolux Grand Marquise, which is my daily driver, is a perfect example - it uses the HEPA filtration bags, hose with powerhead on/off switch built in, & the powerhead has the newer-style 48497 10 degree brushroll for the PN5 & PN6, which greatly improves the performance of the Electrolux L shaped PN. I also use aftermarket tools, or tools from other manufacturers where needed, such as using old Kenmore dusting/upholstery/crevice tools, & the Riccar multi-tool that up until recently was sold with their canisters, before the Riccar Prima/Simplicity Wonder was introduced & the Elux-style combo tool was introduced with those models.
Rob