No we wouldn't. Roker Park was great and holds memories I'll take to my grave but by the end it was past its prime and only held 22k so we needed to move.
What we don't need is to pay a fortune add extra seats to the stadium we have when it's never filled anyway. I mean of all the issues/problems the club may have right now stadium capacity certainly isn't one of them
Tbf none of us know what it would cost. I'm just using other clubs as a benchmark which is as close as we can go. Villa shelving plans to expand Villa Park cos of the cost, Everton new stadium costing far more than expected, Liverpool expansion costing £200m.
Why go to all that expense when money is tight as it is for seats that'll just stand there empty? Makes absolutely no financial sense whatsoever. If the money isn't there to modernise what we already have then it certainly isn't there for a needless extension.
If we do get promoted and being prices in line with other PL clubs our 48k capacity will be just fine.