With the increased fees in Bitcoin's mempool forcing more users into using custodial Lightning wallets, it may be time to once again revisit the Ark protocol.

"Ark is a second-layer solution designed to help scale Bitcoin transactions by using a shared utxo model that enables anonymous, off-chain payments through an untrusted intermediary called the Ark Service Provider (ASP). ASPs are always-on servers that provide liquidity to the network, similar to how Lightning service providers work."