Interesting leveling blocks

The issue I have with putting both tires on leveling blocks is that I am lazy and when I pull up to an uneven spot I don’t know how much height I will need so I put my stack of tapered pre-assembled 2x10s down on the low side and drive up on them till level. Most of the time only one tire is elevated. If I wanted to do both, I would have to drive up on my blocks, test it, if not enough, pull off, stack more wood check again and repeat till level. Much easier to do it just once. I don’t really see a downside.