speed will increase as development continues

LoRa is already surfing on the bleeding edge of physics. There is no way to get anything more out of it, other than allocating wider EM spectrum for this usecase.

There are some radio amateurs in my area trying Meshcore on 169Mhz for example. There are also some new boards available that can do LoRa on 2.4Ghz, but both approaches have some downsides as well.

For a more stable and reliable network, we would also need radios capable of communicating on multiple channels simultaneously (remember, the whole thing started off as a reaction to really cheap, almost disposable dev boards), but now we’re approaching the complexity and requirements of the traditional mobile networks.