The general party isn't being steam rolled though? The GOP held more seats than expected in the house and senate.the general party still has robust representation. They are just deplatforming the most extreme members who seem to be the most predisposed to violence.

No, it's not a one-party system, at least not in the case of Russia. It's just that anyone from the "wrong" parties can't use any mass media to get their message out.

If the tech companies want to short-circuit the right's ability to organize from now until the 21st, that's kind of reasonable, given recent events. Past that, though? They need to be very careful about continuing this. If they do, they need rationales and policies that are clearly stated, and clearly seen to be applied in an unbiased manner.

California is a one-party system and has been for 20 years. I don't really like that model, but it seems to have worked at least in the medium term.

Things might be different at national level, though. States have to deal with more nuts-and-bolts practical issues, so that grounds the politicians somewhat. National issues tend to be more idealistic, so one-party rule could become extreme.

California is not a one party system. It has republican representatives both in the state and national legislatures. It has had one-party rule for a long time, and whether it has “worked” is far from clear. On the contrary, the beleaguered opposition has meant that the government is increasingly running with things that have mostly symbolic or political value rather than work together to solve urgent problems such as the deplorable housing situation and fragmented public transit.