Likely yes. Sony stopped major support for the PS3 in 2021. While they may release a 4.89 in the future to update Blu-ray keys, 4.88 is the current standard.
[Current Date] – Verified that Sony’s 4.88 update servers remain active. playstation 3 system software update 4.88 download
The update file must be named exactly PS3UPDAT.PUP . Likely yes
