THINKING OF BUYING USED ROKU 5 ULTRA, because I want Toslink, audio-only, TV-off capability.
Am I asking for trouble here? Roku still updates the ROKU 5? am buying an obsolete, slow with today's Apps box?
You posted this in the wrong section. The Ultra 4640 is not a legacy device. Almost no one is going to know what you mean by Roku 5 Ultra, as that name doesn't exist. I realize you mean the 5th generation Roku, which is the 4640.
Yes, the 4640 is still supported and works well. The latest Ultra is a bit faster, but overall the 4640 is just fine. It's nowhere near obsolete, and is still very responsive.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.