<iframes> Alternatives, Best practices, Performance, Security, SEO

An html validation err has me thinking about iframes a bit more deeply than ever before!
Here’s the err that’s got me going back to the basics and beyond!

'allow' is not a valid attribute of the <iframe> element.
  1. Granular control of feature policies sound powerful if used correctly!
  2. iframes expose an attack vector to the elements!!
  3. iframes look exactly like a hacker’s best friend!!!

Any thoughts are welcome!!! :vulcan_salute: