I've got one of these:
You can not simulate tubes digitally.
I used to think that also.
I lugged 40-50lbs of tubes around for decades.
Not anymore
Fender Tonemaster amps ($1000). 22lbs
Quilter Superblock ($275 + a speaker cab of your choice). 15-20lbs
If you need a real tube amp sound with some reverb they are the cats meow.
The tube breakup on them is sweet. Whats even better is you can dial it in at different output volume levels.
You just cant do that with a Vibrolux (or a super or a Mark3, etc). There's a certain volume a tube amp sounds perfect. Lower or higher its not always there. It takes an airplane hangar to get there with a Twin Reverb.
If one wants to add an array of pedals, one might not need a tube amp anyway.
I never understood a "tube purist" with 15 pedal chain whining about the sound of the amplifier.
Admittedly, we've waited 3+ decades for solid state guitar amplifiers to sound decent. The last 2-3 years have made a big difference. You may wish to check them out.
No more lugging a 50lb Mark3 around for this boy.
Anyway, thats my $.02