Sure, I'd like to see a brand new stadium built a lot closer to the city that had a retractable roof so Boston could host the Super Bowl, Men's NCAA Final Four and WrestleMania. Adjusted for inflation, the cost to build Gillette is something like $525m. To build a modern 65-70k stadium, and one that is closer to Boston, would surly cost north of $1.5 billion. What incentive does Kraft have to finance a new stadium at that price tag? The Patriots have sold out every home game since 1994. They have a waiting list for season tickets that is in the thousands. They draw a number of non-football events like concerts (Taylor Swift just sold over 180k tickets this past weekend), NCAA lacrosse, and monster trucks. The Revs draw pretty well and consistently outdraw several teams that have soccer specific stadiums that are located closer, or in urban areas.
Patriot season ticket holders never had to deal with PSLs the way other fanbases have had to deal with, such as the Falcons. That's another benefit to the way Kraft has set things up.
Is Gillette perfect? No. But it is a nice stadium that has great sightlines. Unless the state gave Kraft a very sweet deal to build a new stadium, Gillette is not going anywhere for a very long time.