>>106905669
>>blackberry
dead
>>Nokia
dead and replaced by HMD, didn't even allow bootloader unlock for most phones
>>OnePlus
>>Nothing
Wouldn't really trust vivoslop to keep support for 5 years and they provide only the bare minimum (kernel source).
The only other vendor providing device sources is Motorola, but I doubt they would be interested since they have to deal with a lot of low-end to mid-end models they make.
Sony makes sense since their phone division is probably struggling to not get axed like LG and needs more sales, cancelling Xperia 5 line is a indication they're not doing well.