Table legs, crossed , stronger?

I'm planing some tables for growing on.
It occurred to me that picnic tables usually have "X" legs.
I did a search to find out why and came up lacking.
I am wondering if they are stronger, more stable, or both, but we don't build decks this way, so...


What do yall think?

Stability, for sure on a picnic table.
Imagine a couple of five-year-olds sitting at and battling across a table with straight legs... the table would lose.

When you sit at a picnic table you usually sit on a bench. The X shape under the table leaves room for your knees when you sit down and get up. It gives some people the option of scooting to the end of the picnic table and getting up from there. You would be more likely to hit vertical legs with your feet or knees .

The all-in-one picnic tables are a different story. I prefer the versatility of separated benches.

A table will be weaker if the legs are crossed, but more stable, for the same size legs. Making the legs from 2x4 instead of round or square 2x2ish will fix the strength issue.

Thanks for the replies!
I am building from scavenged 2x4s from pallets.
They are between 40 and 48" long.

I'm building for my little big sister, and she likes a counter height of 36, for table heights she isn't sure.
Most sources recommend 28 to 30" heights for tables of all kinds.
I am thinking of building a table 36" at it highest horizontal point and cutting it down from there if need be.

As for the legs, I think I will use vertical legs AND crossed legs.
That is to say, vertical legs with extensive cross bracing.

One more thing.
Any opinions on adding skids?