In respect of PS4 i was talking from memory, so maybe i wasn't completely accurate indeed.... But i was referring to the period that Sony considers "Holiday season", around 20 Nov-31 dec.
As for Switch, i must admit is surpassing my expectations as right now. If i remember correctly I expected around 17'5-18'0M in 2019 back in January, so maybe it can do better. But i remind to myself that it has grown a lot mostly this year thanks to Japan, and that Switch, due to a lot of stock left because of Q3 shipments has had a lot of deals everywhere that helped a lot of the sales recently, despite no new big games. That why i want to see what Switch does starting the new fiscal year. So yes, Switch now seems to me more capable to do 18'5-19'0M in 2019 which will be amazingly good, but I will stick to my 17'5-18'0M prediction yet.
And PS4, is more than probable it is going to receive a discount this year or have constant good deals through the year that will help soften the downward trend of sales this year. I don't think it will remain -20% YOY all the year until holiday season. That's why i expect PS4 doing around 15-16M in 2019.
Both consoles are going to do amazingly well this year, respecting their own circunstances.
Its grown alot in the US as well, Jan & Feb were both up 30% on a weekly average. Also what do you mean alot of deals everywhere? It has yet to drop below MSRP. They had a couple added value bundles but that's pretty normal to start happening when a console is 2 years old, it has little to do with shipments.
Why are your projections for PS4 factoring in a price cut but they seem to be ignoring a price cut or revision for Switch?
When the herd loses its way, the shepard must kill the bull that leads them astray.