There are a lot of people who don't want Bitcoin as legal tender especially when they want to use it in their daily lives, there are a lot of things to consider especially the transaction fees if you,
The people that will not like bitcoin to become legal tender is government people. Because of the hatred they have for bitcoins. But for the transaction fees that you suggested as the one of the point bitcoin will not use as a legal tender. I don't think it is current. Because both those once that is legal tender still have charge's.
I don't see it happening in "advanced" countries like China ever. If you have slightest idea on how China functions, you wouldn't have listed them as an advanced country. In countries like Japan, there is still a possibility to have bitcoin listed as legal tender in future. That could happen in European countries as well. But not in dictator led countries like China or Russia. They will rather implement CBDCs over cryptocurrencies.
We are Just seeing them like that. But in the future time you will see that reverse shall be the case, many countries will not rush to accept cryptocurrency as legal tender because of the incubation they kept bitcoin for now. I they say some countries never started practicing buy ing and selling of cryptocurrency for a living