A lot of users favor a burn that can not happen unless each and everyone chooses to burn their coins voluntarily.
A burn works for BNB because Binance holds a lot of BNB and they have reserves to do buybacks. CZ’s idea would have only worked IF there were enough reserves left to do significant buybacks. Otherwise only option is for folks to voluntarily burn their coins by sending you them to a burn address and who wants that? Or do you want the team to burn the coins you have in your wallet or blacklist them? Who wants that.
The other proposal to add a burn tax is pretty silly because it would never achieve desired result and would only make transactions more expensive, alienating projects and developers. You can not apply a burn tax on exchange transactions, only on DEX transactions. So most people would end up transacting on centralized exchanges to avoid this tax and therefore there won’t be any meaningful burn happening.
So what’s to be done? The fork proposal is the best idea. Both coins will retain value. Study the Ethereum Classic case, the Bitcoin Cash, Bitcoin SV, eCash or Bitcoin Gold case. All these coins are still around and valuable, born out of contentious or amicable hard forks. In Luna case there will be a fork either way. Choice here is - should it be a contentious one or an amicable one? That’s the real choice. A decent enough group will support the old chain, while a significant important group will get behind the new one. Both will live and survive.