Yeah, sorry. I'm like 49, when I started bangin' away on a keyboard in 1982 they didn't have schools for all this stuff nor was the vastness of the Internet a reality lol. We had computer user groups sparsely scattered all over the country as where we thought each other computer programming.
As time went on some of us kept up with it and others had dropped along the wayside. I totally understand the sites you have directed me to and know of the aspect and reasoning. My site uses various different graphics for different devices for the sole reason of clarity, visibility, and design intent related to the fore mentioned.
I'm still old school but my reasoning for relating to the old school methods are for many reasons. Fifty years from now you won't find anyone cherishing a 2017 Ford Mustang but to this day the 1967 Ford Mustang Fastback is well sought after, for many good reasons.