As far as I know Mediatek (and vendors that use those chips) are usually not good with regards to GPL Compliance, which means no Lineageos if kernel sources are not available...
> I agree with the premise that consumer devices, such as mobile phones, should be as secure as they can by default. This can even go so far as shipping new devices with locked bootloaders and blocking access to root. ..
> But this shouldn’t come at the expense of being able to make an informed choice to unlock these privileges to install any software you want, even if that means adopting a higher level of risk.
One does not require "easy root access" to make that informed choice - complicated root access (within reason, as pulling out the soldering iron might be a step too far) should be enough for tasks like installing a new OS because the company no longer supports the hardware.