Today I've successfully migrated customer traffic off an RB4011 to a NetFiber 9 (CRS310) running 7.4. At present the CPU could handle the bulk of the site's traffic if needed (in a pinch), but easily spikes to 80% CPU when offloading is disabled. Once enabled, it drops to 0-5% and uses around 6W @ 48V.
The router is running OSPF, iBGP, and DHCP for about 150 subscribers, with a mix of MikroTik 60GHz and Ubiquiti LTU & Wave subscribers, most of them 200Mbps+ capable. No NAT, minimal firewall (for the router itself), all internal routes.
I look forward to deploying more L3HW-enabled switches as site routers.