Does this Fritz!Box 5530 really only have 3 LAN ports, 1 of which supports 2.5 Gbit/s?
Does the FB 5530 no longer have any USB ports?
Does the FB 5530 only have 1 analogue telephone connection?
(Compared to the "old" FB5490 from 2016, this is very meagre. There you had 4 x 1 GBit/s LAN, 2 x USB 3.0, 2 x analogue telephone connections + 1 x ISDN and you plug the fibre optic cable directly into the device, not into an AON/PON/GPON converter).
So the only advantage of the FB 5530 is the WiFi 6 (faster WLAN)?
But you are comparing products from different price ranges, which is reflected in the different features. If you want more features than the 5530, there is the 5590.
