I never tried their wallet but I wonder if it required opening channels and how much pain they put their customers through to use lightning.

Lightning has many UX complications that don't apply to onchain given that bitcoin's network does most of the heavy lifting wrt state management and finality. Until lightning's UX improvements are farther along, it's not worth the tradeoffs - even for MoE bitcoiners - to use lightning unless onchain fees rise substantially.

Lots of folks use onchain bitcoin for MoE still.