Allow idiosyncratic customizations via CSS and Javascript

I recognize that this may be a firm design decision, but in many web apps, you can apply your own customizations with custom Javascript and CSS. These are typically "at your own risk" but the idea is for light customization without the vendor having to support them or weigh whether specific changes or options have broad enough appeal. Some recent questions seem to me to be examples of this, e.g. in https://solutions.teamdynamix.com/TDClient/1965/Portal/Questions/Details/125750 if they had the ability to apply custom CSS (and the operational hours table is appropriately identifiable in context), it would be a simple thing to hide operational hours. Most simplistically

#divOperationalHours {

display: none;

}

But you might want to make it collapsible and collapsed by default which is probably doable too. This seems to me a way to also allow for some customer-level innovation that doesn't depend on developer effort by TDX.