There is no denying that the future of Cardano is very bright. Exceeding the 5 $ mark is not a big deal, if all goes well, I think Cardano will cross the 5 $ mark by the end of this year. But no matter how bright the future, I don't think Cardano will ever be able to replace Ethereum.
do you mean smoothly is an update that is being run by the Cardano developers?
This progress will surely be seen in the long run. even for the end of this year, I'm not sure all will be ready to bring the ADA to $5. it also depends on the potential of market support in the next year. if all doesn't go as expected, I think the ADA will have a really hard time getting their big adoption.