Update:

> Seems yet another phase may be required: […]

Not just another phase but an entire new donation campaign for another 16000 EUR:

- 5000 EUR: "customized U-Boot, the device tree and the AMD/ATI Radeon video driver"
- 1000 EUR: "JTAG debugger"
- 10000 EUR: "design of the heat pipes and production of 3 of them for the three prototypes"

https://www.powerpc-notebook.org/2023/06/ce-mark-certification-financed-new-campaign-for-the-software-part-and-heat-pipes/
https://www.powerpc-notebook.org/campaigns/development-of-software-components-and-heat-pipes-for-the-tyche-motherboard/

Overall, this means for all campaigns/phases:

I_0. 12600 EUR: Electrical schematics [accomplished]
I_1A. 19000 EUR: PCB [accomplished]
I_1B. 5000 EUR: Fast SI bus simulations [accomplished]
I_2. 13500 EUR: Prototypes [accomplished]
I_3. 14000 EUR: Testing [accomplished]
I_4. 12500 EUR: Certification [accomplished]
I_5. 5375 EUR: Prototypes and MXM graphics cards [accomplished]
II_1. 1000 EUR: JTAG debugger [10% done]
II_2. 5000 EUR: U-Boot [open]
II_3. 10000 EUR: Heat pipes [open]

If they keep their overall pace of 83% accomplishment in 6 years (= 14% per year) then it will be done in mid to late 2024.

Furthermore:

"We want to thank the dedicated small group of volunteers and especially Max Tretene for their precious spare time spent in trying to configure and compile U-Boot, we very much appreciate their availability and effort, even if a successful result is yet to comes. In addition, we greatly appreciated the offer made by a professional engineer – not to be disclosed yet- that is ready to work for us on U-Boot for a very reasonable amount of money."

I wonder who this is… ;-)