I would rather use liquid than spark. Why isn’t liquid wallet self custody?

So you're saying the funds are stored in Liquid and only shown as BTC? That would be really terrible and very dishonestly promoted

I am a big liquid fan for multiple reasons. That said, liquid bitcoin is held in custody by the liquid federation, and permission from a federation member is necessary to "peg out" back to main chain bitcoin. This is seamlessly handled by the wallet software. Fees a little high for small amounts, but increasingly minimal as amounts diminish significance of base fee. I am a current user of Misty Breez.