The article has a point. I think there are plenty of people who buy a coffee on their way to work in the morning. Nothing wrong with that if you can afford it. One of my DDs does similar. She buy's a bottle of not cheap water every single day. It's her money - but if I was living at my parents trying to save for a house deposit I know I'd have my deposit a whole lot quicker if I stopped spending money on nothingness.
Even if you spent £500 a year on coffee, how long would it take to save up the average London deposit of £50,000-60,000?
Yes, if you saved that £500 a year instead, it would still take you 100 years to save up - just for the deposit!
Now, how long would you need to give up nice coffees for to buy the whole £500k house.....?
Er.....
And boomers wonder why young people might feel that they'll throw caution to the winds for that flat white or a bottle of "NOT CHEAP" (!) mineral water. Hell, why not go the whole hog and have an avocado toast whilst looking at your iPhone. Just to throw away those savings plans and live dangerously a little, you know.