[thijson]

I looked a bit into the LORA protocol. It does offer reception below the noise floor. LORA doesn't do anything to attempt to make other LORA transmissions seem like noise to a receiver that's attempting to lock to your transmission. This makes it possible for a transmission that's closer to the receiver to essentially jam a transmission that's far from it. I guess since LORA isn't used that much, it's not a problem these days. I think it's being used as part of Amazon's sidewalk network though.

[Gibbon1]

One of the things you can do with Lorawan is use multiple gateways. Interferers are always an issue for a bunch of reasons.

The worst is when someones on your channel using the same modulation as you are. If he's louder he'll blow your packet out of the water. Keeping your packets short and using max power (cheezy grin) and retrying helps.

But even interferers on different channels will degrade your sensitivity and reduce your range.

None of this is unique to lora modulation.

[bri3d]

RC stuff (ELRS, Crossfire, etc.) like the parent post mentions mostly avoids this issue by also using FHSS.

[eternityforest]

I think the different spreading factors can share a frequency at the same time.