Pros

• cheap and reliable
• an ETR subroutine for 3 credits is strong early
• useful against Atman, since it is so often set at strength 4

Cons

• won't add much protection lategame

Thoughts

• probably best used as a price tag on R&D (or maybe HQ)
• or it could defend an early Melange Mining Corp., and after the runner trashes it, add to the effective trash cost of some minor assets
• I don't think adding Wall of Static to an agenda server adds much value though, unless you want to take an early gamble
• It is however perfectly priced at 3 credits, because you can always defend R&D and HQ with two 3-costers without needing economy boost like Hedge Fund
• It might be playable on Archives to deter against Datasucker charging runs