Concrete is certainly cool, but Wooden structures can be built many stories high. So the implied history of 'mud walls to concrete' is a bit off here. In some places wood was used for spans long after they had concrete: I'll give my own country, the UK 🇬🇧 as an example. Cut and shape a few trees is still a good option in many places. But of course it burns or rots eventually so there is little evidence of very old structures.
Composite materials are cool (steel and concrete) but its actually a very old technique: hair and straw reinforced bricks, even sod/turf and as other comments have noted, there are pitfalls to certain kinds of steel, that other mixes may overcome. 😁