I’ve been saying move to international size ice for a while. And it honestly wouldn’t take that many seats, and the prices would all move back one. So you would lose a couple of the cheap seats.
Brian Burke did a nice segment on this the other day. He was saying the board of governers asked the Penguins in 2009 to retro fit their new rink so it could accommodate a switch to a "hybrid" bigger ice if needed, they would simply have to extend/install the systems under the ice for the cooling a few feet both ways They said no, so other new rinks like Vegas and Detroit, and Seattle, followed suit. It won't happen now because of the expense to tear up the ground and install the equipment.