It’s also way faster. The average time it takes to resolve an offside with semi-automated offside is <30 seconds compared to over a minute with the existing line-drawing (though it has gotten quicker as officials have gotten used to it). With SA offside systems the only decision that needs to be made is if the offside player was active.
I actually think combined with AI it could be done faster, and you can solve for whether the player is active that way. Wouldn’t be surprised if it could become near instantaneous in the future. People will say that’s fantasy and will never happen because only humans can make that decision, but they’re wrong. AI is orders of magnitudes better at consistently applying complex rulesets than humans if you feed it the right info. I can guarantee you somebody is working on it.