Originally Posted by
Earl5607
4130 chromoly is used a lot on professional frames and forks and guess what it’s still steel.
You said that heavy steel makes training better.
In any event, it's been a couple of decades since professional frames (i.e., those used in races by riders on professional teams) were steel.
That said, your Kent Nazz looks as if it would be an enjoyable ride, especially since it sounds as if you know what you're doing with respect to maintenance. I have a bunch of high-end bikes in carbon, aluminum, and steel, but I'm just as happy riding my old hybrid that weighs around 36 or 38 pounds with rack and panniers. It's still the same rider, regardless of what bike I'm on.