@Patrick Connor
The thing is, in the video game industry, TGA is kind of a standard (I even think Unreal Engine converts all texture to TGA on import).
Most of my library and libraries out there are composed of TGA with some info on the alpha channel, like transparency for foliage or AO info, etc.
The issue for me is that I cannot import the alpha channel. So for example, say I want to convert my TGA file from 4K to 1K to the suggested PNG-24, the alpha channel info will be gone.
PNG for me is fine, but ONLY if Affinity can read the alpha channel from these TGA files. So if you start to "support transparency of targa files on import", that would be it for me.