But all energy and efforts to generate these BTC are for nothing to?
Is there any word of the devs about this?
Do you think someday devs will discuss about?
Probably the energy used to mine these btcs were too little, as most lost bitcoins were lost on the first years, when they weren't so valuable, then people didn't care too much about their coins. Actually, nobody is worried about these lost bitcoins, because it will be good for btc price on long run, as scarcity helps the currency demand to increase, furthermore there isn't what to discuss about it, what is lost is lost.
It's like a lost private property: if someone else tries to find or claim it, he will be invading something that doesn't belong to him, that would dirty bitcoin proposal and concept.