It’s not true on-chain self-custody like Lightning since you’re relying on Spark Operators to move your funds for you.
Discussion
There’s also a slick website to look up all transactions you make on WoS because it’s using Spark.
But this also makes it a poor choice for privacy, since anyone can see all of your transactions if they know your static Spark address.
and you can extract someone's spark address from any of their invoices
Yeah, that’s also very disappointing.