Should have waited for the new model?

It's just like when you buy a car or a computer or some other technology: not long afterward the new model comes along and you begin to get "buyer's regret".  Of course, there's no way that I would have wanted to wait for this new model of stent, especially since it is probably years from common use even if it does prove to work:

http://www.dailymail.co.uk/health/article-1319737/Soluble-stent-open-arteries-melt-away.html.  Thanks to Shelley for the link.