"This is a 1960s or 1970s Kirby vaccum cleaner...had it tuned up and it worked for a while. It works a bit but not great for our needs."
It may be true that there are purists out there. People so committed to a "vintage" lifestyle that everything they touch must have some old-timey cred. God knows I love my mid-century furniture, and an early 60's Ford Falcon is a thing to behold, but there are limits to my - and I presume anyone's - willingness to live in the past.
Some items have been improved and have developed with time in a way that can't be ignored in pursuit of period realism. I don't want to cook my food in a 1960's microwave. I don't want my dentist to work on my teeth with a 1960's drill. I don't want to pay the electricity bill for a 1960's air conditioner. And I don't want to vacuum up my dog's hair with a 1960's vacuum that "works a bit."