Step 1.
Any web page has 3 fundermental files,
1). html file
2). javascript file
3). css file.
2025, dojo mistake happen in javascript file, read this
https://transparentgov.net/cleargov1/1856/us-gov-lose-billions-tax-%24%24%24-due-esris-grave-mistake-years-ago
Another mistake esri made is in css file, it is calcite
https://developers.arcgis.com/calcite-design-system/

Step 2.
calcite is esri branded, 3rd party( not browser native ), css style.
https://www.esri.com/arcgis-blog/products/developers/announcements/whats-new-in-calcite-design-system-february-2025

Step 3.
No wonder why all 30k us gov mapping web site looks similar, same color, same style, same button, same function.
because of calcite
https://www.esri.com/about/newsroom/arcuser/calcite

Step 4.
I have no question about esri use their branded calcite color style in esri's own website, like arcgis.com. esri.com
But the evil is, esri inject calcite into every version of Arcgis javascript SDK release.
for example, in Feb 2025, v4.33 new release, component is bundle with calcite !
https://community.esri.com/t5/arcgis-javascript-maps-sdk-questions/6-23-2025-released-v4-33-bug-found-please-have/m-p/1626802/highlight/true#M87282

Step 5.
when 30k us gov agency use arcgis javascript SDK api to develop their own map apps, they suddenly found all of them actually are wearing the same pants. Same Arcgis feels and look pants.
Walmart is blue,
target is red,
home depot is orange,
lowes is blue,
best buy is blue,
ikea is yellow.
Every business want their unique color is common sense.
Now by injecting calcite, all 30k us gov agency are wearing same esri branded, same color pants.
Esri already is leader in gis market, no competitor, don't make sense.
https://www.esri.com/about/newsroom/announcements/independent-report-highlights-esri-as-leader-in-global-gis-market

Step 6.
Sooner or later, esri will realize that have all 30k us gov agency to wear same pants is disaster !
At that time Esri will silently abandon calcite like they abandon dojo in 2025.
The aftermath for 30k us gov is lose previous invested billions $$$ tax money,
re-invest another billions $$$ to re-build everything.
Step 7.
Step 8.
Step 9.