My latest response to Framework support (answering their most recent questions)
Testing without expansion cards
I’ve run the laptop on battery with the expansion cards removed for approximately 7 hours and experienced no crashing. If I connect a charger it directly into the expansion bay port it does crash again (has happened with two different chargers).
I’ll conduct another on-battery test with expansion cards fitted and see if the above behavior (7 hours run time) is common or not.
Memory
The original memory I purchased was 2x Team Elite 32GB DDR5 5200MHz (non-kit) | Model: TED532G5200C42-SBK
I then purchased 1x Crucial 32GB DDR5 5600MHz | Model: CT32G56C46S5
SSD
Team MP44L 2TB M.2 2280 NVMe PCIe Gen4 SSD | Model: TM8FPK002T0C101
Chargers
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Alogic USB-C Dual Display (DP Alt. Mode) Dock DUPRMX2-100
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Dell USB-C monitor (this is at work, fairly confident the model is P3424WE)
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Heymix 100W GaN X100-2C1A-P49S-AU
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SlimQ 100W USB C Charger F110
All of these chargers/docks were used by my previous laptop without issue.
I’ve had the crashing happen using 4 different USB-C cables that have been working fine for the past year, I’m super confident that 4 different USB-C cables did not fail on the same day 
Not sure if it’s related, but I’m using power-profiles-daemon with default settings in my NixOS setup. Unsure what Fedora 40 does out-of-the-box, but as I said the crashing happen even just running the Live USB.