They more or less intend to supply the hardware only. This avoids the pretence of vendor updates entirely, by both the company (Pine64) and the ARM licensee (Allwinner).
The software stack is up to you, with mainline Linux support courtesy of the A64  powering a number of 'RPi-killer' boards. Device updates will be supplied by the likes of Ubuntu Touch, LineageOS, postMarketOS et alia mobile distributions.
Maybe. Except that for me (and I know I'm not alone) the second most important part of my pocket computer after web searching is the camera, and they're unlikely to have anything great in there.
Hah. The repeat GPL violator?