[zozbot234]

> If I offer to turn them off they often get surprised at how much faster the phone feels after.

If you're using Android there's also a "visible touches" option you can turn on in the Developer settings. It's a big UX enhancement of its own and IMHO should be promoted to the Accessibility settings (together with the options for speeding up or disabling animations).

[arcanemachiner]

What are the benefits of enabling this feature?

[zozbot234]

It provides a quick feedback loop when you're trying to poke at stuff on-screen with your fingers. Which is nice since it lets you know quite seamlessly (1) how good your aim is, which gets kind of critical when using fingers on a touchscreen compared to a mouse. and (2) whether a tap has even registered in the first place, which is often problematic for many users who may be wearing gloves, have drier skin that doesn't register as easily, etc. etc.