So you're actually saying 4 -1 = 3
I sort clarification because I recalled some discussion earlier on in the VP4 release about whether or not if an IR block was added, and as its not like an effect you need to turn on-off, that it might or should-best-be added as an internal block that would be accessible through the Global settings.
Probably not really an issue if you are using the VP4 in a traditional "real" guitar cab setup. but if you are using it in an "FRFR" / Direct kind of setup, that leaves you only 3 Blocks for "effects" .
View attachment 49442
B.t.w ^^^ its there for a reason :)