i've spent the last two days playing around with @arkade_os. it is super promising and i encourage people who care about scaling bitcoin to look into it.

the ark operator cannot unilaterally spend your funds onchain (unless you miss your opportunity to finalize your balance onchain. this is where ark is different to rollups; users have to cooperate with the service provider to settle onchain within a certain time period versus a proposer doing it on everyone's behalf)