Is now a good time to invest in SO4, page-3

Take a look at the KLL SP run up prior to their financing/CR and compare it to S04 and then re-read the post by Franz.
It is also worth comparing the MC of KLL & SO4 if you belief in value. If you really belief in value compare SO4 to RWD.

Despite what SO4 claim they are currently all about a relatively small, high grade trenching operation. They do have the benefit of some instant infrastructure but they don't have access to NAIF funding. The Williamson pit might initially mislead you when you examine how many Gigalitres it actually contains and how many GL they will abstract per annum.

They have permitting to dewater Williamson pit and pump brine into relatively small on lake ponds. They still have to receive approval (as far as I am aware) for the abstraction of brine by trench and bores.

The most advanced and arguably lowest risk WA SOP investment is KLL. They have some excellent partners