The answer really depends upon how long you plan to keep the car.
If on a short-term lease (up to 3 years), the answer is NO, because even if Tesla does get FSD working, it won't happen soon enough to justify the cost.
If you plan to keep the car for at least 6 to 8 years, then it may make more sense to purchase the FSD option, especially since Tesla plans to begin releasing features for FSD customers in the 9.0 software release.
We purchased FSD for our 2017 S 100D and 2018 X 100D, and while we don't expect to see either vehicle drive itself any time soon, what we do expect to see is improved driver assisted features, utilizing all 8 cameras plus the upgraded AP processor sometime next year.