It dissolved in December 1991.

https://en.wikipedia.org/wiki/Dissolution_of_the_Soviet_Union

As someone who uses GrapheneOS with Sandboxed Google Play for nearly a year now, I am struggling to think about why one would not be able to use it as their daily driver. It has all the features of a regular Pixel phone, except with more security. And the security features are not even some high-level enthusiast stuff, it is (among others) some really basic features like restricting internet access for specific apps or only giving apps read permission for specific folders on your phone instead of everything. Basic security and privacy features that every device should have.

Whilst Germany deployed only 18 of its own tank model (A7V), they did capture hundreds of allied tanks and used them in their own regiments.