That's very unfortunate, as I do value open source hardware. However, I value my time more, and Pruša have become complacent and released incremental updates (most of their printers aren't even CoreXY), so Bambu turned up and are eating Pruša's lunch.
I don't think there's much inherent value in the CoreXY geometry. MK4S seems to outperform everything Bambu has both on speed and on quality (especially on overhangs and dimensional precision) despite being a bed slinger.
On the other hand, continuing the bed slinger line let Prusa provide an upgrade path for existing printers.
The Prusa XL may still be worth it if you need that sort of thing.