I'm in agreement with those who have commented (and those who are thinking) that because the product is "plastic" (I'm repeating the use of that as a general term, so please do not take offense), it just doesn't make sense that it can hold up to heavy use. Then again, we see manufacturers' statements leading consumers to have high expectations about performance. My concern about sand being drug in during the winter months and scratching/pitting the tiles just seems to be side-stepped when I've reached out to manufacturers. I don't want to hear "it will hold up" to salt and snow. I want to hear it'll get scratched and pitted to the point it will be noticeable, which - yes - is more of a cosmetic than performance issue. And at what point, if any, does that become a warranty claim?
It's all about detailed information. Sure, it may look great from 20 feet away, but I want to see what it looks like from 2 feet away. And the gaps/seams between tiles - things have to work their way through and at some point get trapped in the channels leading to a drain. Sand, grass clippings, small leaves, or whatever does not just flow through freely like water.
This forum is great, and there are countless members with great knowledge and experiences. I look to everyone for their individual opinions and experiences so that I can make my best educated decisions. And as I take on and complete projects, I'll share with everyone so maybe someone else can use that in making their decisions.
This form has seen feedback that RaceDeck has proven over and over that it's a great flooring solution. Not only that, but the service is commendable. The OP didn't say anything bad about the other areas of his garage - so it appears he's happy with how the product has performed there, correct? And who knows how the tire path areas will look like once a maintainer product - maybe it'll restore the tiles back to show minimal wear?
For the issues of salt between the cracks being difficult to clean, and the sand particles working underneath the tiles and causing extra noise when walking over - maybe it all comes down to cleaning and maintenance? Clean the salt with "X" product and pull up tiles to sweep,vacuum,hose, or whatever. Fixes, yes, but have people been aware and have the expectations that they may need to pull up how many square feet of tiles every so often to do so? That's valid enough for some to sway their decision.