I would say in my opinion. That they are not a priority.
And with some things that cause a lot of food for thought.
The idea that a simple problem of a Drivechain for incentive issue, rises up to screw up something the mainnet.
Even the current second layers are growing at a fast pace but there is still experimentation as it happens with LN. Which I hope will continue to evolve 👍.
Already financially oriented layers like Liquid or RSK. Let's see how they continue to grow