eventually hostgator will ask you to upgrade to a vps or somethin
Or they will, without notifying you, move your site to a so-called "temporary server" that doesn't have full functionality, lacking things like an email server. Then when you contact support they don't know about the move and start guessing what is wrong for days until you eventually have to flee to another hosting company. But maybe I'm the only one that has happened to.
I have over 300 sites on a Hostgator shared account not a problem. You just need to watch your CPU usages for the most part.
i had like 1.5 million hits in a few days.
the website was still up, fine, and running.
i don't know if hostgator ever asked me to switch to VPS because i signed up with phony details
It can handle as many as you can probably get. It's not like 2002 where a lot of hits would jam the average hosting account.
The only question is how fast of a server response is acceptable to you.