Hi humpback,
I think the frames themselves will be very durable but the bigger issue is how they will affect the mattress on top of them because they haven’t been out long enough to know for sure. They are likely to be fine with a mattress with a polyfoam base layer but I would be a little cautious using them with an all latex mattress. You can read more about this in post #4 here.
The ones with more longitudinal wires or that have a cover on top could be less “risky” IMO.
Phoenix