I don't have any numbers, but it probably depends on whom you ask. According to Wikipedia (in Russian) [1], 84% of the people in Kazakhstan can speak Russian, and 74% can speak Kazakh. Ethnically, 22% of the population is Russian, and 66% is Kazakh [2]. In urban areas, it is not unusual to encounter ethnic Kazakhs who speak Russian but not Kazakh.
It is likely that the Russian language will continue to play a strong role in Kazakhstan, so many people will probably need to know both the Latin and the Cyrillic alphabets, once the transition takes place.
It is likely that the Russian language will continue to play a strong role in Kazakhstan, so many people will probably need to know both the Latin and the Cyrillic alphabets, once the transition takes place.
[1] https://ru.wikipedia.org/wiki/%D0%AF%D0%B7%D1%8B%D0%BA%D0%B8...
[2] https://en.wikipedia.org/wiki/Ethnic_demography_of_Kazakhsta...