According to CodePen’s Chris Coyier, which uses cross-origin iFrames for every customer, “For now, even the cross-origin removal is delayed until January 2022, but as far as we know this is going to proceed, and then subsequent steps will happen to remove them entirely. This is spearheaded by Chrome, but the status reports that both Firefox and Safari are on board with the change. Plus, this is a specced change, so I guess we can waggle our fingers literally everywhere here, if you, like me, feel like this wasn’t particularly well-handled.”
The ramifications of this are unknown. The question remains, why not update these functions rather than remove them entirely? Not only will this require an intense re-education for current devs to figure out new ways to provide the same functions to their users, but it will also cause users (and even some devs) to use older browsers longer. Using older browsers poses a security risk for businesses because they lack support. And if your business has a regular modernization cycle (which it should), then those older browsers cause technical debt your business doesn’t need.
As a business leader or owner, you want to make sure that all of your systems are up to date, that all software and known vulnerabilities in technology are patched, that tech debt is kept to a minimum. Most devs and internal IT teams are incredibly overworked and struggling to keep up with their daily tasks. Don’t make more work for them, bring in an expert who can help you ensure your business and security are modernized and stable. Big changes like this happen from time-to-time, so it’s important you have someone you can call at a moment’s notice for assistance. Build that relationship and make sure your business stays in business!