When Cliff does the amp models he does precise circuit analysis and precise frequency response matching.
However, the first 50 factory presets are not built with us sitting next to a setup of all 50 real amplifiers with their respective ideal cabinets cranked to ideal volume levels. When you dial up the right Amp/IR combo you will pretty much always be in the ballpark and (more importantly) you'll always have amazing tube amp feel and response and to me that is what really matters.
And finally, a lot of this is subjective. Just because you don't like an amp model doesn't mean the model is incorrect or has received less attention.
However, the first 50 factory presets are not built with us sitting next to a setup of all 50 real amplifiers with their respective ideal cabinets cranked to ideal volume levels. When you dial up the right Amp/IR combo you will pretty much always be in the ballpark and (more importantly) you'll always have amazing tube amp feel and response and to me that is what really matters.
And finally, a lot of this is subjective. Just because you don't like an amp model doesn't mean the model is incorrect or has received less attention.