While the PS5 reached the 10 million consoles sold milestone in 249 days, the PlayStation 4 reached that number in 271 days.
Compared to Nintendo, the Switch reached 10 million sales in 9 months, while the first sales report for the Nintendo Wii after the milestone said 13.17 million consoles sold in 10 and a half months.
Sony expects to sell 14.8 million PS5 consoles in the 2021 fiscal year (April 2021 to March 2022), and by looking at how many are already sold.