That's a true house of learning right there, I'm not quite sure if you're being sarcastic with me here though
If we do go the route of a new stadium, I'd still like Old Trafford to be a big part of United, maybe we build it quite close-by? - I've been lucky enough to visit both OT and the Bernabeu and I'm quite envious of their museum / trophy room for one. Would love for Old Trafford to have that kind of trophy room - While I like the one that we have at OT, I thought the RM one was just class and made you appreciate every trophy as you walked through it. I think the concept of that round (home) dressing room that City have is quite cool as well, although we've only recently renovated ours.
If we're rebuilding and we still want to be best in class, we have to factor in things like capacity expansion (At least to 115K?) via expansion of the south stand perhaps while increasing the comfort level of attendees across the whole stadium, maybe a retractable roof, retractable field pitch complete with underground greenhouse, additional hospitality areas, better gym / player facilities, underground parking maybe, conference areas, better media enclosures etc. - It cost Madrid around 1.2 Billion pounds at ~2% interest to add all of those to a stadium that's about 40 years younger than Old Trafford, so it will likely cost us more. It's difficult to say as a fan whether such an exercise will be worth it, and whether a rebuild can make Old Trafford one of the best in class for the next 30 or so years.