I have been looking at replacing my L3 switch at the gateway of my network & the OPNsense DEC850 seems to have all the features I want, mainly, vlans, 10 GB wan, multiple 2.5 GB lan, & open firmware. Does anyone have experience with this router/ are there better routers out there that do similar setups? I have experience with Cisco hardware and am willing to learn new syntax so I am not too worried about the CLI, but I heard that opnsense’s docs are a bit thin.

Shouldn’t this be a non issue for the gateway. For more context on my setup, I have a jellyfin & navidrome server which are all lan. I have a wireguard exit node, a WiFi ap, Plex server, & normal residential traffic which would be querying wan quite often. Would you still expect to see the drawbacks of software switching? If so, what would you reccomend for the router?
I haven’t tried navidrome etc. with software switching, but I would assume they work fine, as they also work over the internet. It’s more of a problem for protocols designed to run in the same L2 network.
I never did that extensive testing, because I either had a printer in the network or needed more ports, where getting a switch was cheaper.