Whilst I admire your proceeding efforts with these affordable TPA series of amplifiers (opamp "rolling, capacitor replacing, unicorn-dust adorning, etc), imagine if all the time and effort was spent in areas that have an actual potential to improve sound. Start with room acoustics- REW is gratis, and a good-enough USB microphone isn't very spendy. Learn about DSP. There are tons of resources, on this forum. I'm frankly amazed (and humbled) by the qualifications and practical working knowledge shared here.
A small amount of effort expended in this regard yield measurable improvement to not only your sound, but why it's improved. Once you lean a few basics in electronics, things will quickly fall into place, and then you may understand just why opamp "rolling" is a waste of your time/effort (assuming the I.C in question is operating normally).
Hope this helps.
Once you stop being pretentious and so willing to sling a bunch of suppositions around, you might enjoy this space a lot more. You assume quite a bit, specifically around a hobby, my hobby, that puts tinkering in its proper place and is enjoyable from that perspective. If you have suggestions for room treatments and what not, perhaps start your own thread or find one needing your precious advice. I don't need any help in that area... But thank you kindly for jumping to that conclusion. Honestly though, I don't see anyone here, in this thread, pursuing the goal of top notch, audiophile experiences. We're just here having some fun with a cheap amp. A particular desktop amplifier whose predecessor was improved greatly and verifiably so with the use of a very specific discrete op-amp. Not a simple IC. Others here have also swapped out certain components with measurable results. This new unit however came with 5 sockets for op-amps and there are people interested in rolling them in certain combinations.
I however am doing other verifiably beneficial improvements that allow for better heat transfer from the TPA3255 chip to the heatsink used. Venting the case to allow air to interact with the heatsink so it can actually function as designed. Swapping the main capacitor from a 50v to 63V has its own merits. These improvements though have nothing to do with the sound of the amplifier.
As far as my op-amp choice, you obviously are not familiar with Andrews work, his qualifications, reputation or his clients. So perhaps you will take the time to familiarize yourself with some of these elements that you're so ready to dismiss. Because of course, you realize that you can't argue against something unless you fully understand all the particulars of the subject being scrutinized.
If you would like to share experiences relevant to the thread, please feel free... But if you're only here to offer your two cents and condescend... Consider the value to the thread your two cents actually brought. I doubt you have enough unicorn-dust on offer yourself to actually make your reply as meaningful to the participants as you intended.