In all things, I follow the maxim, "Make everything as simple as possible ... but no simpler."
The topic came to my mind spontaneously, and I didn't hesitate to open the thread. Just now, something else occurred to me. The esteemed designer Dieter Rams had the following maxim: 'Less but better'. (Weniger, aber besser) I have tried to internalize this philosophy.
For me, DRC/DSP has been the single biggest improvement I ever had from anything in audio. And it's cheap. I apply DSP to my speakers, to my headphones at home, to anything that I stream to wirelessy.
I agree with with your guys general stance on simplicity, being a computer guy it reminds me of the
https://en.wikipedia.org/wiki/Unix_philosophy
Make each program do one thing well. To do a new job, build afresh rather than complicate old programs by adding new "features".
What I disagree with is the idea that DSP is complex. Sure if you zoom in really deep everything is complex, but with the tools we have today applying DSP is so easy that I really see no reason not to it. Measurements for headphones are numerous from various sources, ways to create EQ/Convoling files are a lot and you can easily arrive at something that you like in very short time. And applying DSP is very easy, especially if your source is a computer anyway. And even if not, just get a MiniDSP.
Sure you can theoretically achieve the same results without DSP, but it will involve a lot of trial and error and probably be very expensive. But my main point is:
Most people do not know where the bar is. How high the bar should be. What is possible.
DSP offers a degree of perfection that is hard to achieve otherwise, and I have good gear with good measurements and generally follow the common advise when it comes to room acoustics. I never had anything where DSP did not significantly improve the result. And on top of this: It allows you to tune to taste, without the need to buy new gear.
In the 70s and 80s hifi gear used to have all kinds of knobs and buttons, it almost looked like a control panel for a space ship. Then in the 90s devices got reduced, tone controls were a no-no because of the holy simplicity. I like simplicity. But when what you have does not fit to what you want and you have no means to adjust it, what good does simplicity do?
When cars were new, you needed to know about cars to drive one, same with computers. Today you press a start/stop engine button and it just works. It's 2023. DSP is easy and simple.
After decades in the hobby, I've realized that every recording and mastering has its own sound profile so I equalize everything the way I like best. I think of myself as the last creative link in the chain.
On top of using DSPs, I remaster music that I like to fit my own tastes.