Just ordered a CCR1009 from Sublime in anticipation of the 800Mbps upgrade. Will probably be selling off my old RB750Gr3 for cheap if anyone is interested in getting one

It's somewhat inadequate based on my testing with iperf3. The CPU usage runs high even with basic routing between two interfaces and no VLANs, PPPoE encapsulation or NAT. Individual connections tend to slow down for whatever reason when there's a high amount of connections being tracked. You also need to make sure you use ports 1/3/5 and 2/4 for your WAN ingress/egress due to how the components are wired or you might be bottlenecked.