Show me some stats. I don't think that's common at all and definitely not the norm. You might be able to finesse a woman 7-10 years younger than you for a few years but a few things are for certain
1.
Your sex drives decreases exponentially while hers increases and peaks in her 30s. She will be getting dikk on the side because you will not be able to keep up.
2. Generational gap. She will have other men closer to her age that she will keep as "friends" to talk about things you can't culturally. She better be a homemaker
3. Divorce rates increase as you go into younger demographics. A 25 year old woman is much more likely to divorce you than a 31 year old woman.
You might get a kid out of a 4,5,6 year union but that divorce/ alimony/ child support will be coming right up the rear as she marries a man close to her same age. A Coli nikka can dream though, right?