[lelanthran]

> Once an application I'm running on a shared host becomes successful enough, I'm probably going to want to move to a different environment, but I'm still interested in what that would mean for performance :)

Depending on what you are doing and what language you are using, a $5/m DO droplet might be sufficient. I once ran a single multi-threaded server, serving a simple binary protocol, and over a 2 day period it handled sustained loads of up to 30k concurrent connections.

To get it that high, I had to up the file descriptor limit on that host.