I'm 29, I have friends my own age from school and university, but most of those I've met since tend to be a fair bit older. My parents and grandparents (now early 60s and mid 80s) have always talked very frankly about money (we have a distinct lack of 400k salaries in the family, which may help) and it's never been something I'd consider taboo. My husband (37) and my in-laws aren't from the UK, and most of the colleagues I've ever had haven't been British, so there may just be an element of cultural differences.
There's obviously stuff people disagree on. I have English friends my own age who, on certain topics (transgender stuff, notably) seem to be so open minded that everything's fallen out, but we have mutual friends from school who were brought up in quite extreme evangelical Christian households who have retained a lot of the same beliefs . Naturally, there's some fairly substantial differences in opinion there but people get through it. I'm not going to pretend I believe that humans can change sex, or that we were made (10,000 years ago) in God's image, and I feel pretty comfortable defending my position on both (as an aside, meeting said evangelical Christians at school was probably the first time I'd encountered a world view and values system which was so fundamentally different to anything in my family. They're not Westboro baptist types hurling abuse at non believers, they were pleasant, respectful, intelligent, whilst also being fairly unapologetic about what they believe, and it was a very crucial lesson for me to learn to evaluate and articulate my own beliefs. 16 years on, I think they've given up on me coming to Jesus but we can still, amicably, argue the toss on pretty much anything).
There will be a natural point in conversations where it's obvious you aren't going to agree and you should probably move onto talking about something else, but I wouldn't be happy if we didn't feel we could talk about it at all. It's a fact of life that you're going to disagree with people, but emotionally intelligent adults should be able to deal with that.