Yes, that has been a huge realisation for china as well as the rest of the world, Russian forces and their equipment did not deserve the reputation they had.
to expand on your first point, it for sure changes the calculation for china on Taiwan.
Russia will not be a support to anyone, Putin sat impotently by and watched Azerbaijan demolish Armenia who was meant to be under Russia's "protection" (another broken Putin promise, his word is worthless).
If Putin couldn't do anything about Azerbaijan exposing him for the impotent "strongman" he is, what is he going to to help china against Taiwan and the combined might of 31 Nato countries? Simples. Zilch. In fact, he's going so bad he's even draining china's other support option in Nth Korea, dragging the rats down in his sinking ship.
china knows now they'll be going it alone on Taiwan if Xi wants to do something as stupid as Putin.
