Community polling puts it at ~90% support.
This SF is not related to price as has been reiterated, the reduction is negligible (~20%). Especially considering the Puell Multiple. (Miners tend to sell fewer coins as price dips). It’s solely for ensuring the ecosystem has enough time to mature as the first storage rent payment takes from 2023 and that is cutting it fine.
This has been discussed for years by the devs. Previous SF proposal to change the storage rent period was rejected and the soft-fork governance paper used describes this exact scenario (and so does the thread where storage rent was first posted)