Great router overall but...

QuoteThe AVM Fritz!Box 5690 Pro may not deliver the highest speeds but it stands out as the best all-in-one router currently available.

...to be the best all-in-one router it would need to have a 4G or 5G too, with a physical SIM slot. There is a decent amount of routers on the market, actually some are also Fritz!Boxes, that offer exactly that with 95% of performance and everything else as this one here.
 
And before anyone asks why is that necessary to have (why isn't?) - to create multiple WLANs without affecting their bandwidth, plus many other reasons such as simply taking a router with you on your other location for weekends etc.