I heard from a senior that...
When a certain bus gets new WAB buses, they have to dump the old
non-WABs somewhere else, like how they dumped the VOs on
23, 65, 74, 132, 153, all JIS services etc.
instead of making them SP buses.
965's case is because SMRT chooses to dump the O4s on 965.
163's downgrade earlier on was due to HGDEP still having lots of
MK3s at that time, and had to deploy them on certain services.
70's case is due to not enough SP WDDs at AMDEP, as mentioned by
SBS 9631X. Don't think ADD to WSD replacement is good, as it is a
high demand CBD service.
and Sv23/65/74/132/153 all along got the VOs in their fleet....
most of the VO3x kicked out have gone to SP and mostly JIS services
to replace VO2x and LO3x instead.
