That's a very good point and it can go both ways. There may be some use cases that currently are not acceptable for concrete due to its bulk but if reduced by 3

That's a very good point and it can go both ways. There may be some use cases that currently are not acceptable for concrete due to its bulk but if reduced by 30% it becomes viable. I haven't read the archive link yet but if this also extends the life of concrete and reduces maintenance costs, that's a win too.