It depends on what Purism ultimately decides on:
- Use Tiger Lake (11th generation), which presumably does not require proprietary firmware for integrated graphics.
- Use any later generation, presumably requiring proprietary firmware for integrated graphics, and/or using AMD CPUs.
I am confident Purism must take the latter option with an increasingly bloated firmware jail in order to stay relevant to their mission and target audience, since the former option would be releasing a product with a discontinued CPU product line of fifteen months and counting.