I could not find this already having been asked, so I hope this is the place to ask it.
As far as I know, the first optical drives with DVD±RW reading speeds of ×12 CAV and DVD±R reading speeds of ×16 CAV, such as the TS-H653B, were released in the year 2007. The supported writing speeds, especially for RW discs, obviously depend on the disc type. But I don’t understand why the reading speeds for DVD±RW has not increased since 2007.
Since over 13 years, no optical drive I know of has been released with DVD±RW reading speeds of more than ×12 CAV (i.e. ×16 CAV).
The same also applies for CD-RW at ×40 CAV, but I think I have seen one HL-DT-ST drive with CD-RW reading speeds of up to ×48 CAV. But correct me if I’m wrong.
I think the ×16 CAV limit for DVD±R and DVD-ROM is to avoid excessive physical stress on the disc, which is reasonable, but why is DVD±RW still limited to ×12 CAV after >13 years? Is there a technical reason or just manufacturer laziness?