The report published by Digital Photography Review is a bit misleading.
Most of the so-called Zeiss Classic lenses have been replaced by their Milvus counterpart, sometimes with an identical optical formula (e.g. Makro Planar 100mm f/2, Apo-Sonnar 135mm f/2 and more), sometimes with an improved optical formula (e.g. Planar 85mm f/1.4 or Classic Planar 50mm f/1.4 --> Milvus Distagon 50mm f/1.4), sometimes with bigger max. aperture and, of course, a new optical formula (e.g. Classic Distagon 18mm f/3.5 --> Milvus Distagon 18mm f/2.8).
There are still 6 Classic lenses presented as current lenses on the Zeiss website:
ZEISS Distagon T* 2/25 | - Distagon T* 25 mm f/2 ZE/ZF.2
- Distagon T* 25 mm f/2,8 ZE/ZF.2
- Distagon T* 28 mm f/2 ZE/ZF.2
- Distagon T* 35 mm f/1,4 ZE/ZF.2
- Planar T* 50 mm f/1,4 ZE/ZF.2
- Planar T* 85 mm f/1,4 ZE/ZF.2
Cosina, Zeiss's contractor for the manufacturing of the Classic lenses (and the Milvus and Otus lenses too) reported the following news
on their website on December 7th:
2017.12.07 カールツァイス
【生産終了案内】 ZEISS SLR classicシリーズの 一部製品
(2.8/15, 3.5/18, 2/25, 2/28, 1.4/35, 2/135) が生産終了しました
Translation
07.12.2017 Carl Zeiss
【Notice of production end】 'ZEISS SLR classic' series of products
Manufacturing of (2.8/15, 3.5/18, 2/25, 2/28, 1.4/35 and 2/135) has ended.
In Cosina's list there are:
- three lenses already presented as discontinued by Zeiss: Classic Distagon T* 15mm f/2.8 and 18mm f/3.5 and Apo-Sonnar T* 135 mm f/2. Their Milvus successors were announced on 9 September 2016
- three lenses still presented as current by Zeiss: Classic Distagon T* 25mm f/2, 28mm f/2 and 35mm f/1.4. The Milvus Distagon T* 35mm f/1.4 was announced on 21 June 2017. The Milvus Distagon T* 25mm f/1.4 (not f/2) was announced on 18 October 2017. So far, there is no 28mm in the Milvus series.
By the way, Cosina is the manufacturer of the Zeiss Classic lenses and can only announce that the manufacturing of a specific lens has ended. Zeiss, and Zeiss only, can announce that such lens is discontinued.