Agree that it depends on age.
Dh and I...
Met when we were both 26
Moved in together after six months because it was expensive paying two rents and we both wanted to buy. I moved into his, he continued to pay all rent and bills and I matched that amount by paying it into a joint savings account.
Got engaged on the first anniversary of our first date (27)
Bought our house at 28.
Got married later that year
First child came along two years later (30)
Second child three years after that (33)
We're now both 36 and still happy!