IANAG, but it sounds like it's recorded through a speaker in the room, and the miking wasn't optimal. Now that might be the recording we watch, or the actual output of the plugin; no way to tell. But apart from that, it's quite good, IMO.
As a guitarist, it is important to understand that any time you tell a guitarist that the sound is digital, the guitarist will scoff and say it doesn't sound like real tube amp, regardless of what they said or thought before knowing it was digital.
I gigged around Boston in the early 2000's playing guitar in various rock and metal bands, usually in front of 15-20 people. I had been using a 1960's Fender Bassman and changed out the tubes to some Sovtek ones. Sound guy at one of the clubs (who's had been around for 20+ years at that point and seen everything) noticed right away and asked why my amp sounded off. A little while later I bought one of the first Line 6 modeling amps and my first gig with it the same sound guy said "Ahh, you put the old tubes back in". I'm like, "Nope, totally different amp, and it's all digital.". He didn't believe me and while he was inspecting the amp kept saying "No, no, no. There's tubes in here I can smell them warming up".
A lot of the time they don't mean analogue when they say they don't want digital - they mean that they want knobs and switches to play with. I think some modern Moog's even have a digital stage in the signal path (I might be making that up but I have some vague recollection of it in a schematic)
Making a synth sound good has very little to do whether it uses analogue or digital synthesis these days, but analogue equipment is (for the same price) less reliable, uses more power, less flexible, and more susceptible to being damaged by impacts (and keep in mind that you can't repair a lot of modern gear with SMD soldering experience anyway)
I will say that making digital synths that sound good is an incredibly difficult technical challenge. There are enough mediocre digital synths around that people can get turned off from them. Meanwhile, you can copy some old schematics out of a book somewhere and get something not far from a classic analogue sound. All of the mediocre analogue synths are dead and forgotten.
(I Am Not A Guitarist)