I wonder if laws in Ukraine are different or if we are just ignorant. None of my friends with kids had special car seats, and I hasten to assure you that all these kids survived to their preteen years just fine.
Undoubtedly, such car seats will be getting more and more popular, as the old mentality gets weaker and families income and awareness grow, but still sitting in the kids seat until you are 12 (twelve!) seems a bit extreme.