I’d also highly recommend reading https://endsoftwarepatents.org/2023/04/googles-decision-to-deprecate-jpeg-xl-emphasizes-the-need-for-browser-choice-and-free-formats/ — more than features and future proofing, the big issue here is patents. Google controls the patents for AVIF.

Then again, I use HEIF, which is alternately patent encumbered, and default to PNG and SVG for web-facing graphics.