I wouldn’t say zero gain, you could test out different tread patterns, wheel sizes, wheel widths, etc.
And no more risk than normal (falling on your ass ).
BTW, @turdstomp if you are gonna do this, you should try to copy some car tire treads, see if it helps at all. Maybe make some wheels that work good even when it’s raining out (assuming the rest of your board is water proof/resistant)
Here’s my latest madness. Testing it today, originally inspired to try making an airless tire wheel with nylon, but I figured it’d be more material efficient to make a solid hub, then the airless component in an easily swapable tread. All pieces are 50% infill but are very solid, that riser is over a year old and is 50% too.