I found 100% more tube feel, dynamics, articulations and sound with a Digitech 2112 SGS , that has two 12ax7 tubes going out the balanced left / right outputs, going into two VHT Valvulator 1's ( one 12ax7 tube each ) that has a buffer and finally into two Crate Power Blocks.
I dropped in some gold pin 12ax7 tubes in my 2112 SGS and Valvulator 1's.
The 2112's gain knob allows me to add more gain from Fender cleans, boomy Vox breakup, Marshall, Mesa Boogie to beyond rectified, since the gain knob goes from 0 to 100.
Some guitar player in our audience thought I was using a Kemper, but he was blow away that I was using an old Digitech rack unit.
The way the two 12ax7 tubes, in the 2112 cascades into my two VHT Valvulator 1's is super dynamic.
Tubes are more natural feeling than modeller's IR, but the technology is getting better.