I wonder. I run a website that has ranked on Google page 1 for the relevant search terms just behind Wikipedia for years now. But it's been on the backburner for some time; I've basically been ignoring it. A couple months ago a server migration that escaped my notice took it completely offline. Totally dropped off Google. Well, I just updated the DNS record a few days ago and within a day or two it was back on page 1, right behind Wikipedia.

So in my experience Google is remarkably forgiving.