PxP450 Spanning-Tree

Would be nice to have (R)STP support on PMP/PTP450 gear. ePMP has it, why not Canopy?

At the very least I would like to see PMP450 SMs support BPDU Guard. Even simple BPDU blocking using the SM protocol filters should be possible, no? I'm sure we can go back at least 10 years on the various mailing lists asking for this.