At least a couple of steps yet to beta. We see stable network because the droplets are competent.
Resolving capability to manage weak nodes and not allowing those to be disruptive; then ensuring data integrity, are tough problems and we need to be sure the answers to those problems are solid.
It could equally be that alpha is released subject to caveats about its limitations. That is what 'alpha' normally is?
Alpha perhaps will be a statement of a network that can work but at this point is liable to instability where there are too many weak nodes; and whatever else is an issue. I would expect that alpha data would be wiped again at beta in any case.
I'm very happy with the progress to date .. can't fault it