Have webservers changed radically?
Yes radically. eg: Nginx.
You have got a lot to learn.
Yes I have got a lot to learn, I plan to never stop learning.
Apparently you think "25 years of experience" equates to 25 year old knowledge.
This is not what I wrote or what was intended. I clearly stated my position experience is neither necessary nor sufficient but it does have value.
There is no need to have expert knowledge in HTML1 to become an expert in HTML5. Most likely, mastery of HTML1 would allow a person reach a level of mastery of the newer technology quicker but the technologies are such that one does not need to know the prior version in order to learn the newer one. So yes experience has value.
I started to swim competitively in my late twenties. I could swim since I was a child, but I had never learned to swim correctly. Swimming is a highly technical sport, due to the fact that you are propelling yourself in water instead of air (higher density thus more drag) makes any technical mistake extremely costly in terms of speed and efficiency. At that time in my life I was at the peak of my physical ability. But when I would enter the pool, I would swim with people that were no where close to my physical fitness level, but these people had been swimming competitively since they were children, they could beat no problem. It took years of practice and coaching to reach a level that was somewhat close to them. The point is that there are some activities or professions where experience carries greater importance, where experience is necessary. Web development is not one of them, I'm not saying it has no value, but I would certainly say that willingness and ability to change and learn new technologies is a more important factor.
The biggest tech companies that exist today were all founded by people that had little to no experience. Let me be the first to say, it shows in some very important aspect of the business. But these aspects are not related to tech but more related to managing large businesses, and other social issues.
The overall point is that there is reluctance to embrace new technologies and concept with many in this community and there are other area on the web that are thriving as they are focused on discovering and discussing the newest technologies. Here there are long drawn out discussions about keyword tools or how Google is out to get the small guy that span many pages whereas threads discussing concept such "semantic search" or "entity recognition" are left with few comments.
I hangout here because it is a laid back vibe, one can ask open unstructured questions and still get a good response. And one can still get a pretty good overview what is happening in Search and AdSense. But I spend my time elsewhere looking for new ideas, new technologies, and to find out what's hot and what's not.