But what is the importance of this light when pretty much all laptops these days are SSDs?
It is, recently just bought Asus Zephyrus G14 octa cores Ryzen laptop, which is a new 2020 model, it uses exclusively NVME drive only, not even SATA, and it has drive activity led, which is quite handy, especially there is a heavy activity on the NVME.
As the NVME SSD drive is quite fast, when casual/normal loading program only gives faint blink and sometimes went unnoticeable, but when it lite up constantly, it means something is seriously hammering the drive.
The 3 tiny dots at the top position are on/off, charging and drive activity indicator.