> Oh, and everyone wrote HTML tags in all caps. I don’t remember why we all thought that was a good idea. Maybe this was before syntax highlighting in text editors was very common (read: I was 12 and using Notepad), and uppercase tags were easier to distinguish from body text.

The use of uppercase HTML tags in the early days wasn't primarily due to memory concerns. It was more about readability and consistency. As HTML evolved, lowercase tags became the standard for better readability and compatibility with XML.

Another point that in the early days of computing, memory was a precious resource, and every byte mattered. Some developers believed that using uppercase characters could save memory because uppercase letters have simpler representations in ASCII, occupying fewer bits. However, this difference was extremely marginal and hardly made a noticeable impact on memory usage.