New fangled stuff. :B Nothing still beats good old treated lumber. Cheap, compared to 12 pounds each, um... not anything near that heavy ... solid, lasts forever, and the footprint can change at a whim or different surfaces.
I've been using these same blocks for the last 20-plus years. Actually, they came out of an old barn when the owner took one of the horse stalls down. The barn was over 100 years old when the stall came down, and that was years before I got the lumber. That timber was so rock solid, I had to cut it with a chain saw. I had enough to cut 6 pieces. I wish I had more.
Now, I carry 4 more pieces all the time that came out of another old barn that had actually fallen. The owner let me get my chain saw and I chopped another post. This one was 6x6 inches and the wood was pretty much a rock again. I carry an assortment of 2x6's, 2x4's, and 2x8's. When I know I'll be parked at a campsite that is unlevel (left-right), I have some 4 foot, 6 foot and 7 foot long boards for under the tires. When parked on grass, regardless of the time of year or where it is, the tires are always on the lumber.
Do they sink in the grass? Yes, but with my folding camp shovel, they pull up real easy. Nothing beats treated lumber. And they never break either.
They come in handy for other purposes too:
Bet you can't do this with Lego blocks? I've painted them several colors over the years:
When we got the 5er, I had to find new ways to carry all this. The shell on the truck has been removed, for obvious reasons:
But, I've always said there is not a right way, or a wrong way, to go camping. We ALL just do it different.
Good luck with your new find. I hope they work as well for you as my solution has worked for me.
Happy Camping, and thanks for sharing.