How should you define where your support starts and finishes? When can you reasonably use a new CSS feature or browser API? Despite my general grumpiness around the new Baseline metrics, Richard (and by extension, Clearleft) makes a solid case for using it as the basis for a new browser support standard. Is a feature widely available? Then use it! Is it only newly available? Consider it for a progressive enhancement, or ignore it for now. Seems reasonable to me!

(FYI, the whole statement has been open sourced by Clearleft, too.)

On how defining "latest two versions" is no longer a meaningful metric:

When considering browser versions, we were fairly sure our client didn’t mean, for example, versions 124 and 125 of Chrome (released on 16 April and 14 May 2024 respectively)

On when to think about using brand new browser functionality:

In other words, will using this feature harm browsers that don’t support it? If a newly-available feature can be used as a progressive enhancement, we might well use it

On building with the web in mind::

If content is unreadable in some browsers, that’s a bug that we will fix. If content is displayed slightly differently in some browsers, we consider that to be a facet of the web, not a bug.