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How many more SSRs could plausibly have comprised the USSR? POD as early as 1900 if few effects before 1914. Borders not much past the OTL USSR's.

I could see the north caucasus becoming one. Karelia maybe, especially with a more successful winter war. Maybe a far eastern SSR instead of merging the republic back into the Russian SSR. the baltic states could have been broken up different;y. Latvia especially could easily be broken into 2 or 3. Kaliningrad oblast might be an SSR instead. Tuva easily.

What else?

What would be the effects if the USSR broke up similarly to OTL?
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