I don't own dedicated or VPS server but one of my company site was hosted on the VPS server (running on Virtuozzo) but we never got the good performance on VPS and we needed to move the site to dedicated server. The dedicated server costs more but we get better performance and stability with dedicated server. I think everyone are looking for uptime and statbility of the server
.
Also the problem with VPS server is, if in case the main server goes down due to some reason your server will also go down and if the provider has not cofigure the virtulazation software properly then there is a chance that your server may compromise.
From the above, it doesn't mean that it is not advisiable to use VPS but this is my thoughts that I have sahred with you guys.
Regards,
Kailash