Yes. Will probably go ahead and do thatOn my TE4 Roamio, the app loaded, started playing live video for about 10 seconds then froze. So I wouldn't advise upgrading to get a working Pluto app on Tivo. It probably doesn't exist.
Have you considered using an actual streaming device?
Wow, that's amazing. Didn't think it was possible to use the streaming apps without a subscription.I have an 'unsubscribed' Bolt with TE4/21.X that will stream Pluto very well. I ran it for a few days just 'tinkering' and it did well. I streamed some W-Series Formula racing using beIN SPORTS XTRA and Pluto. The complete Pluto channel guide for 'LIVE' was present and worked while I tinkered. I wouldn't want to consider it 'dependable' but it worked!