Your question is somewhat unnecessary, as Digitec has noted in the delivery date that they will update the delivery date if they have further information.

Manufacturer's specifications: Dimensions with stand (W x H x D) in mm 829.9 x 428.9 - 548.9 (depending on angle of inclination) x 252.4

Which processor do you have exactly? According to ark.intel.com, the i5-4200U (Intel HD 4400) supports a maximum resolution of 3280x2000@60Hz via HDMI 1.4 and supports 3 displays/monitors simultaneously.

No, it does not have a Thunderbolt port. The data sheet is wrong. Unfortunately. I would have liked to use it too.

Do you think it is not recommended or have you heard / read that? I bought the screen last week because the old one no longer met my requirements in terms of colour reproduction for photography and image processing. The very detailed test report from Prad.de, the reviews from Amazon and the excellent price-performance ratio convinced me. So far I am very satisfied with one small downer: the integrated Intel graphics card of my laptop can "only" manage the resolution with 50Hz and does not allow the use of the Nvidia =(. But that's not the monitor's fault.

Yes, 100mm. The stand is also attached there.

No traces of use!

Indirect. You need a miniDP (Thunderbolt) to Displayport cable. https://www.digitec.ch/de/s1/producttype/video-kabel-295?f=137576&tagIds=77-533-532