You’re misunderstanding the question - he’s asking how Shopify could avoid jurisdiction, not avoid this suit. Jurisdiction is a threshold question before you get to the merits… maybe Shopify did the bad thing, maybe they didn’t, but before we decide that, we need to determine if California law even applies to Shopify.
The author seems to think that there should be some way for Shopify to avoid jurisdiction while still offering services in California, but I don’t really understand why he thinks so.
As a former student of the author, I don't think he's saying they should be able to avoid jurisdiction. I think he was musing on whether it would even be possible under this new Ninth Circuit framework/test. He concludes it's unlikely, and hence for Shopify (or any other company putting cookies in browsers) to have any chance of avoiding it, they're going to have to appeal to SCOTUS.