How many of you use iframes
would you suggest it over html?

iframes was used in the past very often

How would one go about using IFrames in the absence of HTML? HTML must be used to display an IFrame. That being said, no, I do not use IFrames, and I strongly suggest other not use them either. The overflow property and various types of includes make them obsolete, and they are too unfriendly to end users, newer browsing devices and search engines for anyone to make use of them.