I love Roku products. This is really an enhancement idea.
I'm really surprised they haven't made a programmable remote.
It would be great if a Roku remote had all of the programmable buttons that a SideClick has. I've put SideClicks on most of my Roku remotes, and they aren't cheap. They also make the remote a bit awkward.
When I don't have a SideClick the remote for my Ultra is missing one ESSENTIAL button, the MUTE button. I have to turn volume down all the way down if I use my Roku remote, or I have to grab another remote if I actually want to use Mute instead of volume.
The current wifi remotes have a mute key, which includes the $29.99 Enhanced Voice remote and $19.99 Voice remote:
https://www.roku.com/products/accessories/player
19.99 Voice remote is sold out in that link, but the exact same remote is sold under roku tv and it is in stock:
https://www.roku.com/products/accessories/roku-tv
The current wifi remotes have a mute key, which includes the $29.99 Enhanced Voice remote and $19.99 Voice remote:
https://www.roku.com/products/accessories/player
19.99 Voice remote is sold out in that link, but the exact same remote is sold under roku tv and it is in stock:
https://www.roku.com/products/accessories/roku-tv