I'm not, and would never badmouth a Kemper. It's the best amp I've ever had and an amazing tool that I love and makes me want to play every day. I really think I will never need anything else and the sound cannot be improved, as it sounds exactly like the target amp through a cab and mic does now. I greatly appreciate that Kemper amps keeps adding cool things but I just think liquid profiling is optional tonestacks which are nice but unnecessary. I was fine with generic adjustment of the "snapshot".
As always ... the most important ultimate rule is "do and use what sounds best to you".
Perhaps just to clarify generic vs liquid stacks ... I assume your Amp is in the "800" vein (?)
If you set it up and do a "generic" profile and then a "full new liquid profile" .... and play them back .... each with the same exact settings being unchanged / un-tweaked on the Kemper, they *will* sound absolutely and exactly identical ... this is by design.
So if you you just want to use several / many exact amp snapshots at different settings and never tweak any of them on the Kemper ... then there is no difference between the 2 x types of profiling
However, when you go to adjust the Gain / EQ [and Bright Stack on the LP] ... they will start to sound very different very quickly.
The "generic" will sound like all legacy profiles have always sounded when adjusted .. ie: the post-recorded EQ "sound" and the Gain being cut or boosted by a straight-flat clean cut or clean boost.
The "LP" ... in this case assuming you use a "JCM800 Amp Channel" ...will respond and sound much different once you start to tweak it on the Kemper ... much more authentically like a "real" JCM800 amp .... perhaps not exactly the same as "your" 800, but very much like an "800".
A very simple and quick test anyone on OS10 can do ... which I have done several times and posted A/B audio clips in other forums ... is:-
=> go to say, the Rig Busters Official Free Liquid Profile Pack on the KPA website
=> pick the JCM 800 LP named "RB - Mars CM800 Rock - 2023-07-17 11-32-29"
=> play and record 3 or 4 short clips with the G / B / M / T at crazy different settings
=> then replace the Liquid Profile Amp Channel Stack and insert the "Generic" Stack ... the old/legacy stack
=> now set the Amp to the exact same crazy different settings of G / B / M / T
=> what you will hear very quickly is that LP, as the Gain and EQ all Increase, the sound "stays in-tact" like you would "expect" a real amp would "authentically" react.
=> what you will hear with the Generic Profile as the Gain and EQ all Increase, is the sound very quickly starting to disintegrate and rocket-off into a bizarro fizz-laden-saturated-mess ... just terrible
If you really want to hear how "un-authentic" the Generic stack is .... just go to the equivalent free MBritt Pack ..... grab his 50w 68 Plexi ... use the "MB - 68 Mars Plexi 50 - 2023-07-24 14-42-42" preset which uses the LP Plexi Stack .. set everything on 10 ... sounds as you would expect ... then change the stack to Kemper Generic and set everything to 10 ... and it is one of the most horrifically bad amp sounds you are ever likely to hear :).
Anyway .... regardless .... "horses for courses" as they say
The *only* thing that matters is what is best / preferred for anyone.
Just some food for thought
All the best,
Ben