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As a point of data, Animated PNG is finally (as of ~2019) supported natively among all major browsers.

https://caniuse.com/#search=animated%20png

Edit- I was unaware the recently-announced Safari 14 Technical Preview adds support for WebP too! Making both formats viable for all browsers, finally.

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Recently we've been going through the browser stats on our websites, and while globally apparently IE is dying, it's certainly not dead yet. In the specific industry I work in (Heavy Automotive Retailing, eg Truck Sales and Servicing), we see upwards of 30% of our users on browsers <= IE11. All of our sites are getting poor lighthouse scores on performance with the main suggestion to be changing to webp, but that would exclude 30% of our customers.

There is a way to offer both jpg and webp, letting the browser to choose.

Ooh, does that mean that slack supports WebP now?

Update: nope. Maybe another year :(

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