These discussions just show how much people rely on their own, very small, personal samples and then extrapolate it out to 'everyone else.'
e.g. all the people 'I don't know anyone my age who can afford to buy.'
If I think about, say 100 people within 5 years of my age (31), so peak millennials aged 26-36, whom I know well enough to know their housing situation, so, friends from home, siblings, their friends, uni mates, colleagues, etc., I would say 95% of those who stayed within or moved to 20 miles of the area I grew up in (capital non London UK city) own their own homes, including my 26 y/o brother and his g/f, both of whom earn less than £20k p/y. Some even have two homes as both people in a relationship bought, moved in together, and now rent the second house out.
However when it comes to friends who live elsewhere, mainly S-E or in other countries, this goes down to, I'd say roughly,30-40%. Which is why articles like that are so damaging and mis-representative (and, unsurprisingly, London and South East focused) because it suggests that nobody under 40 can afford to buy, whereas actually lots can if they were prepared to move or make significant lifestyle choices. Obviously there are lots of completely valid reasons why people might not be able to/want to do this, but it's not an impossible dream, it's something that is achievable if it's enough of a priority to make (sometimes significant) changes.
In that guardian article 50% said buying a home was one of their main ambitions in life, yet 42% had saved absolutely nothing towards it! I mean, come on if it's something you want that much, most people would start saving something.
Yes it was much easier to buy 20/30 years ago but there is assistance available for first time buyers now, e.g. the fact that a H2B ISA means the govt will give you 25% on top of what you save is a huge incentive, and a bonus you don't get for any other type of purchase. Nothing like that, e.g. completely free money, was available when my parents were buying their first home in the 80s, and interest rates are incredibly low now compared to then. It's swings and roundabouts.