Besides ca. 70 million speakers, Turkish already has a Latin alphabet adapted to Turkic sounds (ç, ş, ı, ğ, c, … ), and adapted IT and printing technology.

The Latinisation process has taken quite well in Azerbaijan and (seems so) Turkmenistan. But the way it was done in Uzbekistan (with sound letters or letter combinations copied straight from English) is clumsy and neither fish nor fowl.

The same reasoning applies, IMO, for Tajik which is not really a language but sovietised, castrated Farsi. If it is to keep some position it will have to join up in a wider Farsi sphere and that means re-adopting the Farsi-Arabic alphabet.

BTW, the whole Uzbek national identity that the regime constructed after the USSR (Özbekçilik, the Timur cult, … ) is a completely artificial, neo-Soviet (in fact Lenin is merely remplaced by Timur) concept that holds little ground among the people.

Indeed if you go deeper into Uzbek or ohter Central Asian identities then you see basically two elements that come up: the Soviet-colonial experience, and Islam.