I use Pluto to watch some old sitcoms and game shows (currently The Drew Carey Show and 25 Words or Less) and TV Westerns (currently on Season 16 of Gunsmoke and almost finished with Wanted Dead Or Alive, Somehow this Classica thing got a push recommen,dation, so hey.
I used to think that The Roku Channel & Pluto were more or less the same. There's certainly overlap, but enough of a difference to matter.
And then there's Tubi, which has buttloads of early TV (like, EARLY) and other uber-niche type stuff. Like, I just finished all 4 seasons of the two-network, 2.5 premise Joey Bishop 1960s sitcom, which is nowhere near as shitty as today's online consensus will have it. It's a warts and all time capsule.
All of this shit has commercials, but hell, this notion of commercial-free TV runs contrary to my upbringing!