I don’t think there’s a latency number that fits all people.
Some people’s brain will accept 10ms without a problem.
Here I can only speak for myself :
I bought the QC with the intention of having a “all types of situation” preset.
This preset had 4 mod Blocks, 2 drive Captures, 1 fuzz Block, 1 compressor, 1 “girth” drive Block for simulating an amp breakup, 1 eq for one annoying guitar frequency, 1 slap-back delay, 1 tap-tempo long delay, 1 room reverb, 1 shimmer reverb, 1 amp combo Capture, 1 eq for high-end/low-end tailoring.
Everything on 4 rows with 1 output for my stage amp & 1 for FOH.
This added up to 9.75ms
The latency + being a couple of meters from my amp made it really hard to play for me (fighting against the fact I was always a bit behind the drummer).
Then again, I have been working my chops all my life with a click, my own backing tracks/loops or some kind of Band In A Box equivalent.
I like to be able to play tightly on the Grid, play laid-back, play aggressive (ahead of time), and doing all of that intentionally of course if I need to.
So I’ve been compromising ever since :
- No Rows 3&4 (+2.67ms)
- Avoid FXLoops (except if really needed) (+1.85ms per Loop)
- Use the Send 1 Output to my stage amp (so that I can put the block anywhere on the grid and not have to use a row Output)
- Multiply presets if I need multiple/different mod Blocks that wouldn’t fit on Rows 1&2.
I’m still keeping all my analog Amps, Cabs, Pedals.
Not too sure at this time if I wouldn’t switch back if NDSP took ages to optimise/fix those latency issues.
And, as a reminder, this is totally subjective (just my point of view) !