Safari sandbox isn't identical to Chrome's but it's pretty effective. I don't think your statement is a fair one without qualification.

ETA: we'd appreciate info about specific info wrong with Safari's sandboxing. We are definitely looking to improve it.

Oh ok.

You make this claim over and over again and then double down on it when pressed (you literally call Chrome and macOS Safari "incomparable"), but you fail to provide any reason or evidence to support your claim and instead always insist on counter-evidence. When pressed (further down in this comment thread), the only thing you share is this vague idea that Apple isn't incentivized to make Safari secure on macOS. You also compare Safari/Chrome sandboxes several times after declaring them incomparable.

You then, unprompted, create a comparison of all the major browsers again with no citations or supportive reasoning.

It's all very strange.