Just washed the crosser off earlier and noticed the wear indicator was now merely as deep as a penciled on one!
So it's visible but that's about it. One more ride 😕

Depends as clint would say " Are you feeling lucky punk"
Seriously a few more rides but wear indicators are there for a reason.

I'd order new wheels/rims, then swap them over when they arrive, no point pushing your luck as invariably it'll hurt!

crosser prob not so bad, since the pressures are lower

I blew one side right off a mtb wheel running slicks at about 80psi once !

If the braking surfaces are starting to look curved, it's too thin.

Also look for circumferential hairline cracks.