[Qluxzz]

Maybe I've been lucky here but my Oneplus One (April 2014), now flashed with lineageOS is still receiving updates.

Android version: 10.

Android security patch level: March 5 2021.

[techrat]

> now flashed with lineageOS

Your device is not stock and is, therefore, an exception.

[heavyset_go]

How old is the kernel?

[Qluxzz]

Kernel version: 3.4.113-lineageos-g168ab7a #1 Thu Mar 11 08:34:55 UTC 2021