I think this question raises even larger questions about Esri's plan for .NET LTS releases when MS only supports LTS editions for 36 months. The issue of transitioning from .NET 6 to .NET 8 will be faced in another 36 months when they have to move from .NET 8 to .NET 10. Esri has been averaging around 8-10 months between releases of ArcGIS Pro, so they likely won't be able to squeeze two more releases in before November, 2024.
The stickier issue with MS's support timelines for .NET is that Esri's support lifecycle for ArcGIS Pro aren't lining up with MS's support lifecycle. For example, ArcGIS Pro 3.2 was released on 11/07/2023 and is in "General Availability" support through 05/31/2025; however, .NET 6 support ends on 11/12/2024. From an enterprise security perspective, that creates an issue because .NET 6 will need to be removed from machines around that date, which means ArcGIS Pro 3.2 won't work anymore.
