The sales decrease every year but Sony still doesn't understand that they have to cut the price...

Surely Sony’s strategy is to maximise profits while the PS4 continues to sell well, they lost so much money during the  PS3 era, surely the PS4 will get a price cut when PS5 releases, making it a cheaper alternative. PS and PS2 were the cheaper alternatives when their successors released, prolonging their lives (PS1-30m, PS2-50m)

When the PS3 was released, the PS2 was sold at 105 millions.

They cut the price and the PS2 continued to have good sales

But that had muxh more to do with the PS3 costing so much initially that nobody could afford it. The sales of the PS2 went down on a trajectory that implies that the pricecut didn't do very much to the sales in the end, having contributed to about 7-10M total max.

Sure it was something important

But I know a lot of people that had a Gamecube and bought a PS2 because it was sold new at only 69€ 

They bought it just for exclusive games

Besides this, I can see them doing later, also to reposition PS4 in the market after PS5 launch, but not now for at least two related reasons: current pandemic pushed many governments to limit outside activities and travel (even in cases this is the dumbest choice possible), so indoors activities, including videogames, received a boost, but the pandemic also negatively affects production and shipping, so any further boost in demand could be almost totally wasted by offer not being able to meet it, so much the worst if it were obtained by cutting profit margin.

Nice and steady. Xbox shouldn’t have a problem cracking the 50 million lifetime.

If it passes SNES lifetime Id be happy. Xbox One would be the most successful failure in gaming ;)

Another good week pushed by FF7R, let's see how much longer can PS4 still push in hardware.

You right, more like a successful comeback. Had Phil not turned things around this could have easily been another WiiU.