It reportedly checks subscription upon putting the vest on and supposedly won’t turn off mid ride.

And if there’s a bug in that code, you’re fucked.

Safety features should work if everything else fails. Their failure mode can’t be “fuck it, it didn’t work”. Which is directly opposite to the failure mode of a subscription based service.

My dad worked for AAA. Once he got a call because a lady’s car errored out and thought she didn’t have her seatbelt buckled mid-drive, so it shut the engine off. On the freeway.

Even without a subscription, failsafes should always fail safe.