I stand by position that Ukraine as a proof of concept could be, was, and will be viable only as a bridge between West and Russia, not as a fortress on Dnieper decorated with Balkenkreuz-styled banners.
In a role of such fortress, it will inevitably crumble and disintegrate due to internal conflicts, mainly between aggressive integral Ukrainian far right nationalism and Russian-speaking populace, even in absence of Russian aggressors.
The situation there across Ukraine is not much unlike Ulster Troubles for Great Britain, although Ukrainian language always enjoyed much greater levels of proficiency among citizens than Irish. However, Russian clearly dominated, despite lacking official status, and this fact is even recognized through special mention of Russian language in the Article 10 of the Ukrainian Constitution. (This article had been largely ignored by officials and “activists”.)