I do not agree with that at all. I have been running a Routerboard RB2011 - which is a level 3 router with 5 Gigabit ports, 5 10/100 ports (one of which is PoE), an SFP port and a USB port - for 6 months and it's been working flawlessly.
I have VLANs and subnets configured, and I have an LTE...