I suppose I'll trust the reality of what actual users are expressly asking for vs. your imagination that something different is implied
That said: these actual users didn't demonstrate any hacker spirit or interest in using JXL in situations where they could. Where's the wide-spread use of jxl.js (https://github.com/niutech/jxl.js) to demonstrate that there are actual users desperate for native codec support? (aside: jxl.js is based on Squoosh, which is a product of GoogleChromeLabs) If JXL is sooo important, surely people would use whatever workaround they can employ, no matter if that convinces the Chrome team or not, simply because they benefit from using it, no?
Instead all I see is people _not_ exercising their freedom and initiative to support that best-thing-since-slices-bread-apparently format but whining that Chrome is oh-so-dominant and forces their choices of codecs upon everybody else.
Okay then...
In the current scenario jpeg xl users are most likely to emerge outside of the web, in professional and prosumer photography, and then we will have — unnecessarily — two different format worlds. Jpeg xl for photography processing and a variety of web formats, each with their problems.