Quote - The Latin alphabet, though, has proved infinitely more flexible, as English, Welsh, Hungarian, Polish, Swedish and Turkish itself (to name only a few), have abundantly proved.

Is is incorrect in case of Poland. Poland has adopted the Latin alphabet, but it is a nightmare to read or write something.
Russian alphabet has 36 letters, but Latin only has 26 that is not enough for expressing the required sounds, so for expressing these sounds you need to combine several letters.
You have, ch, sz, rz, s with ', s with dot, z with ', z with dot, o with ', a and e with a hook, l cut by /, and more.
You  write "przszy...", too much letters for only two sounds.
 It's a nightmare!!!!, well Chinese is worst.

Stupidity also evolves!