Phew, I've just read through the whole thread again. Firstly, thank you very much for the rich and informative input. 
If I had to summarise, I would say that the situation is complex and opinions vary greatly.
Some don't see it as an issue at all, as long as the capacitor has the right electrical values for the job all is well. There is no need to think about this stuff.
The other extreme is the perspective that down to the dedicated material properties and other unmentioned parameters all play their part and need to be considered.
Of course, there are also all the shades of grey in between, which in my view probably come closest to the truth.
What does this mean in detail, what do I take away for my practical work?
I try to avoid capacitors that I can avoid, sounds strange but is meant seriously. My namesake probably takes a similar view, it would be interesting to see how this could be applied in practice using the example given.
Yes, sounds logical and I think it would be exciting to try biasing a tube with batteries. I've really wanted to try this out for some time, I'm curious to see how it works.
It's true, it's always easier to find something if you know what to look for. But overall I have a similar view, our world tends to polarise, and not just in the electronics sector.
Well, in this case it was quite simple. The test apparatus masked the process and my ears were the sensors. I am very aware of the limitations of our sense of hearing, but on the other hand this is ultimately decisive for me, as I perceive the result only through my senses. The differences were really very small to non-existent despite my very biased test perspective, because I wanted to hear differences. Overall very disillusioning but just a specific application that cannot necessarily be transferred to all other scenarios.
Thanks for the additional info, Thor. I guess I'll throw away my 1% rule of thumb when I wire capacitors in parallel, see also JR's experience.
I clearly disagree with you on this point. Even in its current state, ChatGPT already offers considerable advantages for those interested. Yes, there are still plenty of problems with the quality of the answers, but I think that can be solved in the near future.
You also have to bear in mind that the level of knowledge of potential users varies and therefore the usefulness can also be different. I would also like to draw attention to the simplification of knowledge transfer for people with disabilities. Think about it.
Beyond that, AI is a disruptive technological revolution that will change everything. The use of AI-based assistance systems in professional life will be commonplace and necessary, because otherwise we will no longer be competitive. You don't have to like it, but it will happen.
I agree with moamps's grading of the ChatGPT response for this topic. Yes, you get the impression that the "student" didn't really understand the topic (which is true!) and it also sounds like a lot of hearsay, but let's be honest. What would be your summarised answer to these questions? I would just like to point out once again the very different perspectives of interested parties and experts in this thread. With this in mind I think the answers from ChatGPT were pretty good!
