There are tons and tons of cryptocurrencies that have infinite emission schedules. Doing that doesn't appear to give any competitive advantage over other currencies. I don't know if they've decided yet, but the I wouldn't be surprised at all if the subject of this article(Ethereum) ends up with an infinite emission schedule too. It's very common among cryptocurrencies who use Proof of Stake as their decentralized consensus method of choice.
Plus, Bitcoin isn't deflationary by any standard definition of the word. It's not inherently price deflationary of course, since that's dictated by demand. And the money supply inflates, albeit at a known predictable rate which slowly decreases over time.