I have to agree with you. To me the IRs sound incredible, as do the stock cabs.
The flexibility of the stock cabs make it my go-to at this stage. You can't really make an IR on demand.
That's said, the possibilities with IRs are close to endless. You can bake-in pretty much anything into an IR (mic, cab, eq, reverb). That's pretty cool, but rigid.
In conclusion (my conclusion) both are 100% good sounding and usable. I just tend to prefer the stock cabs.