This feels cruel at this point but Switch to PS4 hardware ratio for this week is 87:1

What will you do when PS4 sales are 0? You can't have a ratio with 0!

The rumors that concerned a Monster Hunter World announcement included a statement that Sony paid off Capcom to prevent new Monster Hunter games being made for Switch. Each passing month without a MH announcement for Switch adds more credibility to this rumor. That would also be by Monster Hunter World is impossible on Switch, according to Capcom. Not because of technological hurdles, but contractual ones.

While it has been stated previously, Capcom's management was once again asked if there were any plans to port Monster Hunter World over to Nintendo Switch during a shareholders meeting. The answer was simply "no."

However, when Capcom was asked if it would consider developing a new Monster Hunter game that could be popular with high-school kids, the company said "yes." 

Due to Monster Hunter World's lack of portability, it's not as popular with Japanese high-school students, which is why Capcom is likely keen on developing a Monster Hunter game specifically for the Switch.

This is the first I'd heard about this rumor.  But after a quick Google search this is what I found specifically:

https://www.laptopmag.com/news/monster-hunter-world-not-coming-to-switch-but-another-game-might

"Monster Hunter game" can mean a lot of things, but what people want is mainline Monster Hunter.

For the 3DS, Nintendo made a deal with Capcom to prevent mainline Monster Hunter coming to all other platforms (most importantly, PS) for the duration of a generation (2011-2017). That left the door open for Monster Hunter Frontier and other spinoffs if Capcom wanted to.

I consider it very probable that Sony did the same thing, starting as soon as Nintendo's contract with Capcom ended. Except that Sony specifically targeted Nintendo alone, hence why Monster Hunter World could still release on Xbox and PC. That kind of exclusivity deal comes cheaper than outright exclusivity and for Sony it only ever was about Nintendo to begin with.

In any case, there's a chance that a Monster Hunter spinoff could release on Switch, perhaps something like Monster Hunter Stories for the 3DS which was a different kind of RPG set in the Monster Hunter universe. But mainline Monster Hunter shouldn't be expected.

What actually gives what Rol posted some ground is ironically not MH itself but what happened with SFV as that game has a contractual agreement to keep it off other non PC platforms as SFIV was heavily favoured on the Xbox platform because of Live so such a case as the rumour he's referring to is possible.

To respond to an earlier post where someone mentioned about sales even that's not the case because MHW's sales are across 3 platforms when you break down the performance per platform the portables still perform comparable to what MHW did per platform for example from Capcom's own numbers: http://www.capcom.co.jp/ir/english/finance/million.html

MHF - 4.9m
MHG - 4.3m
MH4U - 4.2m
MH4 - 4.1m
MHFU - 3.9m
MHGU - 3.6m

What's interesting here is MHW did 15m across 3 platforms but Iceborne expansion in comparison did 5m across the same 3 platforms where as in the portable side of things the userbase are more dedicated as seen with the consistent numbers for reference 80% of MHF went to MHFU, over 100% of MH4 numbers transferred to MH4U, 90% of MHG to MHGU and so on.

2020 surpasses 3m YTD in week 30, a bar that 2019 didn't clear until week 46. If 2020 is flat from here on out, it will finish with sales of ~5.85m; that's more than half of what the PS4 sold lifetime in a single year.

As for current PS4 sales, that looks more like Sony not caring one bit about the supply chain than anything else. If there were no supply constraints, then the PS4 could sell 6-10k units per week, but such a baseline doesn't add up to anything significant over the course of a few months (~50k extra units), so that's why it likely wasn't worth an effort on Sony's part.