My perspective is that the Steam Deck significantly contributes to this increase.

Additionally, a smaller factor could be the growing trend of Dev and Op professionals moving from Macs to Linux. And the trend before, to move from Windows to Mac's because they are cheaper to administrate. This shift is supported by manufacturers like Dell and Lenovo, who are providing more devices with Linux pre-installed, aligning well with the supply chain requirements of IT departments.

Also, at least for me, it's hard to envision vendors specialising in Linux desktop hardware, such as Tuxedo, Framework, and System76, experiencing a surge in their market shares. I am very curious to see their numbers and the kind of people and companies that buy this products.