Styling certain elements of forms have been difficult from the beginning of web design. Some modern frameworks offer either nicer default styles or the possibility to easily style any form component.
Styling a form is important because it is still, in 2017, the only component that is heavily handled, visually, by the browser defaults, hence forms looking regularly different on Windows and Macs, with also differences between browsers.
Regularly, forum users ask how to handle this: https://forum.webflow.com/t/best-way-to-design-this-complex-product-creation-form/38125
The image provided in the forum topic above (and attached here) is a good example of what we all would like to be able to produce.
An incomplete list of what would be great to control:
Additionally, complicated forms need tables "zones", zones titles and labels...
If you give support to this request, can you add examples of a component you'd like to have control on in the comments?
9/24/19 update: Now you can go fully custom with the design of your form checkboxes and radio buttons (with the option to switch back to the default styling at any point).