[BiggBob]

Yeah we should probably just give it will never work. /Sarc

Or perhaps you have some actual information or sources that prove that a concrete wall will last longer and require less maintenance other than your opinion...

https://bridgemastersinc.com/strong-flexible-beautiful-the-benefits-of-steel-bridge-construction

Many of the great landmark bridges are constructed of steel. Still, it’s important to note that steel bridges aren’t just attractive, they’re generally stronger, safer, faster to build, require less maintenance, and are more flexible, which makes them perfect for earthquake-prone and high-wind sites. Steel is also used to protect elements on bridges, including utility infrastructure.

In addition to all this, environmentalists are more likely to support the construction of steel bridges compared to other types because they’re generally more sustainable and earth-friendly

[JockoManning]

There's a concrete dome in Rome . . . from Roman times. I don't think they do much, if any maintenance on it. It has a central occulus open to the sky. So it gets weather. It's one of the strongest concrete structures on the planet, IIRC.

IIRC, the bridges require lot os painting maintenance.