Hello Hero
My response was more geared towards resellers who have a lot of sites (not just one) and are not sure when to move to a dedicated server.
Your points are valid for shared hosting clients however.
And if the answer is "No, I do not know how to manage a server." that is why GlowHost is here. We will manage the dedicated for you. You won't notice any differences or have any additional work by moving to dedicated should you elect for our managed service.