Diablo 4, reason to multibox?

If I see a benefit then I may dual box manually, using my steam deck as a secondary PC and controlling one char with left hand and the other with right hand.

And whilst I can use actions on the left character, something I've done with Diablo 2 Resurrected and POE, it's more comfortable to have one as a support character - so Auras, Buffs, Summoner.

So what are the benefits are there for multiboxing in Diablo 4? 5% experience boost and double loot? Pushing further quicker?

I mean it might just be beneficial to run after your class with another of the same class to feed it the additional legendaries? since they are more weighted to your class.

Does having a summon army or defensive thorn tank significantly help a DPS oriented class? or will the less co-ordinated movement be a hindrance for bosses?

I suppose there are a lot of events which are stay in one place and fight off waves of enemies... that's good for a boxing setup.

I'm starting to convince myself I might enjoy it... any one else thinking about it?

it's basically world of diablo, so they wont allow it, unlike D3, and it will most likely get treated the same way as WoW and respond quickly to player reports. Probably see an announcement a couple days after release that it is officially not allowed so that they dont have to issue refunds.