No, because if you download it right now, you'll be agreeing to the current terms which no longer gives you permission to ignore new terms as they are released.

Up until now, you could continue using the old engine and never agree to newer terms, and that would be defensible in court. Now, even if you do not update and do not click agree, they will still take you to court and send you a bill, which you probably will have to pay.

Use what, Unity or the ToS? Assuming you meant the ToS under the old version you could stop using an updated ToS only if it violated your rights. (Which is such a weird thing to even mention, if a contract violated your rights then it probably already doesn't apply.) You can stop using Unity whenever you want though because you have free will. Not trying to be sassy about that last point, just explaining why I think I misunderstood you lol.