Are we sure? Jensaari's video (vs. Yoda) makes him look inferior to Kenobi or Kit Fisto as a duelist. Which is within Sidious's abilities to one hit KO. And Jensaari does NOT like Yoda at all, but gave Yoda the win there. All Plagueis really has going for him as a duelist is his oversized weapon, which is normal for one of his height.
Plageius's whole thing is that he 'plays god with the Force.' His tactical applications are relatively weak.
Do remember I joined this board today...literally. If he's been debunked, I hadn't heard about it. I do like Antoine, Reti4, and Evannova's videos better, though. They actually respect Yoda, for one thing. Jensaari just doesn't.
Evannova put Jaina Solo up against Plageuis, who also stomped him with little trouble.
IMO some people just fail to grasp how fast Plagueis and TPM Sidious are. The lightning feat in the forest is phenomenal for a few reasons, as is orbiting Sidious whilst outracing dozens of blaster bolts, deflecting or dodging each one as he passes it. If people were to become more accepting of his speed tier he'd garner more respect in versus debates.
I doubt he would lose to Jaina but that's a whole other can of worms.
Youtubers in particular don't have the best grasp of how speed works in SW, in respects to the various tiers, or how much of an impact speed has on the mythos. Videos like Vodo vs Plagueis, GM Luke vs Mace Windu ect shouldn't be made, because of the obvious disparities in speed (and power) which would render any real debate as redundant.
Well, to be fair, Luke was also amped by his sister and her unborn son for that battle in DE, and while all they did was feed him power...they were still feeding him power. Sidious likely retained an advantage till the sister and nephew kicked in an amp for Luke.
Anyways, my statement that Sidious wins is based mostly on the fact I know the youtube videos made about Plageius better then I know him, cause that's one book I hadn't read yet. (Can't read 'em all...) I figured the youtubers did reasonable amounts of homework, and the Plageius described on youtube is decidedly unimpressive and too slow and ESPEICALLY too lousy a swordsman to hold his own against the Sidious I remember seeing in ROTS.