In reply to tonanf:
I find the Ranger path to be the least problem in snowy weather.
The zig-zags on miners/pig tracks tend to get very icy, especially when there has been slushy snow and freeze-thaw cycles like at the moment, so you can need crampons despite (or because of) the man made path.
The exposed section of the Llanberis path/railway just above Cloggy station slopes steeply both sides so if you get blown off course you may need an ice axe arrest although that's less likely on the new powdery snow that's there at the moment than on consolidated snow with a firm surface. Similarly with the next section - the notorious 'killer convex' above Clogwyn Coch.
The Ranger path is still not completely "safe", but the slopes are more even gradient and without major cliffs below.