I really like electric approach and it has been on my radar for a long time, because it just leaves the writing complexity to you and the API.

Most of the solutions with 2 way sync I see work great in simple rest and hobby "Todo app" projects. Start adding permissions and evolving business logic, migrations, growing product and such, and I can't see how they can hold up for very long.

Electric gives you the sync for reads with their "views", but all writes still happen normally through your existing api / rest / rpc. That also makes it a really nice tool to adopt in existing projects.