This is a petition to enable borrows for wstETH. There are some high level strategies that require full access to this asset.
For example, you can freeze a position when you have ETH as collateral and wstETH as borrow, with very little health and positive APR with current market conditions. The asset was enabled for a long period of time with no drawback that I noticed.
With borrows disabled wstETH cant fully grow, not allowing people to discover this strategies.
Hopefully the asset is fully enabled sometime soon.