Some thoughts from one who "just missed" the Baby Boom ( born in 1967 ), and is far too young to be a "Millennial" (Thank GOD !)
"The 20- and 30-somethings don’t appear to be defined by their possessions, other than their latest-generation cellphones."
"Defined by"? How about "Completely consumed with" ?! It seems that every time my wife & I go out to a restaurant to eat, we notice that parties made-up of so-called "Millennials" are sitting at their table, each absorbed in their own personal digital device, rarely engaging in genuine, direct interaction with the human-being next to them, or across the table.
“They are living their life digitally through Instagram and Facebook and YouTube, and that’s how they are capturing their moments. Their whole life is on a computer; they don’t need a shoebox full of greeting cards.”
"Take Kelly and Josh Phillips, who rent a 700-square-foot apartment in the District’s Shaw neighborhood. The couple frequently sells things on Craigslist and calls an Uber instead of owning a car. “My parents are always trying to give us stuff,” says Kelly Phillips, 29, a real estate marketer. “It’s stuff like bunches of old photos and documents, old bowls or cocktail glasses. We hate clutter. We would rather spend money on experiences.” Her husband agrees. “I consider myself a digital hoarder,” says Josh Phillips, 33, who is opening a Oaxacan restaurant, Espita Mezcaleria, this fall in Shaw. “If I can’t store my memories of something in a computer, I’m probably not going to keep them around.” "
Yep. And they are just one hard-drive crash away from losing all that stuff. And then there's the inevitability of having to update / convert / re-save all that digital info, so that it can still be accessed with the latest technology, once the original formats / software are "no longer supported". Last time I checked, a "hard-copy" photo-album did not require periodic updates to keep the information "retrievable"... you just open the album, and there are the pictures...
“Millennials have stuff on discs and flash drives,” she says. “I don’t think my sons are going to want my walnut table, eight chairs and buffet. We will downsize maybe in five years, and I will either sell this stuff or give it away.”
I wonder how many of these "Millennials" will be singing a slightly different song, a few years or decades down then road, when Mom & Dad aren't around anymore ?
I can appreciate the limitations of younger folks - whose lives are in transition - who don't own a home, and perhaps are still in a "nomadic" pattern with their careers... and big ugly "brown furniture" ( such as that couch in the lead photo

) would be an onus.
Likewise, if my parents had bought trendy, "stylish" furnishings through the years, instead of the various antique pieces they acquired over the years, I can't see myself wanting " a la mode" furnishings from the 1950's - 1970's... yuck.
But I sure as hell want the family photos, and (probably) any letters or scrapbooks... the boxes and boxes of musty "Better Homes & Gardens" from my parents' last move in 1972, those can go to the dump as far as I'm concerned.
To me, there's something more intrinsically valuable and enduring about furniture and other stuff made before WW-II. A Victrola is a prime example - I don't know if Victor Talking Machine had a "targeted product lifespan" in mind when they designed and built their machines ( let's say between 1906 and 1929 ), but short of fire or extreme wet climate, their products still work ( or can be made to work ) as good as when they were new, over 100 years down the pike. ( Yes, I know there was also "cheap crap" made 100 + years ago, but most of that stuff is gone by now. )
According to WP article these smart "Millennials" "don't want Mom's walnut Colonial-Revival dining room suite," but they'll eagerly drive to IKEA and bring home Volvo wagon-load of particle-board "furniture"... where's the value in that ?
I think another fundamental difference between the Boomers and the Millennials as that the Boomers' parents were "children of the Depression", who tended to be savers, and to make things last, and who, when they did spend their money, tried to buy items that were going to last.
For those of us who have "Millennial" children, if our offspring do not want our talking machines, I hope that there will be young folk who DO. Better to to find out sooner than later.