I just bought a Roku Ultra, and I think it's a neat feature that you can program your Roku remote to control your TV using the IR transmitter. I do not have any use for TV controls; I have a Samsung soundbar that I need to control though. The TV automatically turns itself on when it detects a video signal, so literally all I need is power and volume controls for my soundbar. All things the Roku remote has the dedicated buttons for.
I have tried literally every single code under every brand, and none of them work with my soundbar. Presumably, brands won't re-use TV IR codes with other devices in order to avoid code conflicts, but I had to try anyways, just in case. I would love to consolidate 2 remotes into just 1.
I don't think I would be the only person who would find value in having soundbar IR codes available to program into their Roku remotes.