Plenty of condos in the US (and I'm guessing London) use concrete walls between units. This isn't something magic that only the Czech Republic understands.
But concrete is pretty unfriendly to the environment and has a low expected lifespan. Much of the US is covered in trees, so an average apartment is primarily constructed from wood. Condos and apartments are generally constructed to different standards, due to the former being intended as a purchase, and the latter as a rental.
> But concrete is pretty unfriendly to the environment and has a low expected lifespan
reinforced concrete has low expected lifespan in exposed conditions because moisture causes rust causes degradation. The concrete used for division between units, as being discussed here, is unreinforced. As long as there's no sulfate-containing minerals in the aggregate (and it's protected from moisture), an unreinforced concrete block wall will last indefinitely.
Typical dividers in apartment buildings in the west are either concrete as I just described, or they are made with "steel studs" (C-channel with gypsum board). The latter is awful for noise isolation, while the former is okay (and better if some additional considerations are taken).
Apartment buildings in my (north american) experience are built to the same standards as condos. The only time wood would be used in either is in a low rise (<4 storey) construction, which tend to not have any of the density benefits that you want from multi-unit construction, and all of the possible downsides.
I'm more of a 6-8 storey with 90% lot coverage kind of person. 4 storey and less in north american jurisdictions fall under different building code regulations, and typically different municipal zoning regs. They tend to have lower lot coverage (leading to less density), more surface parking (leading to less walkability), lower construction quality (leading to worse complaints from noisy neighbours etc), lower building lifespan.
But concrete is pretty unfriendly to the environment and has a low expected lifespan. Much of the US is covered in trees, so an average apartment is primarily constructed from wood. Condos and apartments are generally constructed to different standards, due to the former being intended as a purchase, and the latter as a rental.