see all the comments on the 1.80 thread about PD5 and the issues it’s causing.
Non-steering riders finally have full access to the road now; whether we like it or not…
Which, in the current state of things, just means that we can potentially get shoved further away from other riders.
But, to answer your OP question; it appears as of 1.79/1.80, the extra lanes of steering riders had formerly, are no longer limited to users with steering enabled.