It's extremely opinionated though - and sneaky because it looks like Trello (cards-in-lanes), but it really isn't; it took a lot of frustration to realize it's more like one of the older tools where the "canban board" is just a duct-taped-after-the-fact view over their underlying data model.

In Trello I can set up lanes and move cards around as I please, in Linear strange things suddenly happen, and it's super confusing to tell what is possible and what isn't.

Like, what lanes a card can be in depends on which team owns the card; try to move a card from one team into another teams lanes, it won't let you without first "migrating" the card to be owned by the other team.