The only thing I would add to that is... feels and punches like a 100 watt amp.
I have played many low wattage amps, and I even built a nice 5 watt single ended Class A EL34 Marshall 2203/2204 amp and while it sounds damn good for a smaller amp, it does not punch, feel or have all the dynamics of a 50 or 100 watt amp. Now I've heard Friedman did seem to make the little 20 watters punch harder but aside from using 50 watt output transformers in them a 20 watt amp will never punch like a 50 watt amp let alone a 100 watt amp. It really comes down to physics having to do with the output transformer.
I know I've posted this before but Vic at Mojave amps built his 50 watt Scorpion with a 100 watt output transformer so it did hit like a 100 watt amp yet was 50 watts. It's really akin to pulling two tubes from a 100 watt amp. When I pull two tubes from my 68 100 watt plexi it still hits the same but at less volume but yet my 72 50 watt Marshall still hits and feels smaller by comparison. I'm sure as smart as Dave Friedman is I'm sure he knows all this and he does mention big transformers in his 20 amp so it's possible he is using 50 watt iron in the 20 watters like Victor did at Mojave. I've looked around and found a 25/50 watt output transformer for my little 5 watt single ended class A Marshall to replace the little Hammond I have in there now......so many projects....so little time.
Pull two tubes from your 100 watter and play it side by side with your real 50 watt amp with a 50 watt output transformer and you will find the 50 watter does not punch or have the dynamics of the 100 watter with two tubes pulled, I'm not shitting on smaller low wattage amps by any means but the difference is tangible and real if you are honest.
https://legendarytones.com/mojave-ampworks-scorpion/
Design and Construction

The Scorpion has components mounted on a turret board, wired up very cleanly in an all point-to-point fashion. To many amp and tone purists, this style of build is the best method to use even though it is much more labor and time-intensive. It’s how most tube amplifiers were built in the ’50s and ’60s and is virtually non-existent today as far as mass-production name brands are concerned.
The transformers and choke are custom-specified and built Mercury Magnetics units. The output transformer in particular is of interest. It’s a larger unit that would be seen more often in 100 watt models. Victor Mason states that there was more to this integration than simply taking a 100 watt specified output transformer and using it for the Scorpion’s 50 watt design.