[ajsnigrutin]

With 5g less and less people use random wifi hotspots, and for home locations, phone manufacturers assume that it's easier for the user to just type in the password than to generate qr codes for their new phone every few years.

[lxgr]

It's still very common for guests to connect to the host's Wi-Fi, as not nearly everybody has unlimited data, and not every home has good 5G coverage.

QR codes are a convenient way to make that happen.