That's true. On the other hand, Linode is competitive on price and service. Every ticket I've submitted has gotten a response within a couple hours. That's pretty good considering how much I'm paying. Honestly, I don't know why someone would get a vps from a different company.
I'm happy you are happy, and am not trying to convert you to Slicehost. That said, a bit on my thought process: I've been with them for years, switching costs are non-trivial in terms of my time (and switching could break stuff), and I have absolute and total confidence in them to treat me well.
I just checked my email. In the last year, I've had three incidents with Slicehost, all connected to issues experienced when migrating VPSes. All were resolved in minutes.
Not to knock Linode, or Rackspace Cloud, or EC2, or whatever, but none of them have ever been in the foxhole with me at 3 AM when the server was down and got it back up before customers noticed.
I think both have great support. They both have active and lively IRC channels where staff hang out. It's usually very quick to resolve issues with slicehost and linode.
The pain point for me at slicehost was bandwidth - they charge a lot, linode charge a little. Also far more options on linode etc etc once I moved that all added up to a better experience.
I haven't checked for a while, but when I compared Slicehost and Linode pricing, they were about the same. I stayed on Slicehost for that reason. Slicehost has been great to me, and I like their IRC channel. I see no reason to switch. I guess I'll go compare again soon and if there's a big difference I'll be obliged to switch (very poor), but I haven't had any trouble with Slicehost.