Luckily it seems like SHIFT Phones is actually improving the situation, they actually have one of their developers helping out with the kernel development and the device is not terribly hard to get postmarketOS on and I think it'll only get easier to dual boot that device in the future. Sadly the SHIFT 6mq that is supported is also not nearly as cheap as a PinePhone. Hopefully we can get similar levels of support on their cheaper mediatek devices.