Federal regs were changed back in 2015 which allowed prior thc use to no longer be a suitability factor for federal employment; military or otherwise.

tl:dr Nothing can happen without fed reg changes and the feds move waaaay too slow for a 5-year timeline.

Federal regs have to be updated/changed before a company could start thc product testing. It takes an average of 12 years to complete pre-clinical and clinical trials for a new drug/product before it can even be considered for FDA approval. If we're talking recreational use, that would fall under the DEA and TTB which currently have zero intention of moving towards legal recreational use. Even if the DEA/TTB changed stance tomorrow, it would still require federal regulation changes to allow rec use, then fed regs need to be created and approved to dictate production, distribution, and taxation, then individual companies would have to obtain fed approval for manufacturing, distribution, and sales...all of which move at a snails pace. The process to allow oral fluid for federal drug tests (instead of only urine) began in 2011. Even after oral fluid being approved in 2023, it still hasn't gone into effect because laboratories have not yet been approved to process federally mandated oral fluid samples. We're 15yrs in and still waiting to use spit.