The USSR is dead and cold, replaced by an authoritarian warmongering machine. It had its moment in the spotlight, but it failed, and it failed its russian and former citizens.

China promotes many good principles (in many ways so did the USA, cough cough), but it is heading in the wrong direction under Xi. It's Communism with a human exploitative flavour, with the occasional public fig leaf of justice. That said, it could offer an umbrella of security for some more interesting experiments in the years to come. Watch this space, I guess.

Circling back to my original point, I maintain that communism isn't going to gain popular support so long as the only viable way to achieve it is through violence and oppression, and so long as it buckles so easily under the pressure of outside forces.

I will continue voting and protesting for sensible left-leaning policies that promote fairness and well being for all, while steering clear of the extremists and simpletons who promote hate or explicitly or tacitly support genocides, wars of aggression, etc. The scales may tip enough one day to justify radical action, but not today - the risks of it going terribly wrong are too high.