Who is designing drugs for cancer? What about drugs for the patients?

I've watched a documentary called "I am Legend", so i know what happens next.

A common cancer drug has been restructured to make its cancer cell killing abilities up to 20,000 times more effective while also reducing its toxicity

far more powerful and targeted—leaving healthy cells unharmed.

The new drug entered leukemia cells 12.5 times more efficiently, killed them up to 20,000 times more effectively and reduced cancer progression 59-fold. This was all without detectable side effects, according to the researchers.

It has only been tested in animals thus far, but wow

I'm just waiting for the next article which says one of the potential side effects is that patients might dissolve into a puddle of goo.

Sure hope it's a drug against cancer.

So fentanyl for cancer!? RFK better get to stopping this.

And what's going to happen to the price of that drug?

What does "it killed cancer cells up to 20000 times more effectively" mean? Genuinely asking because in my mind it's ethier dead or its not. The other stats make some amount of sense to me but I can't figure out what this one is saying.

So I can keep my peanuts?