I found the ThinkPad L14 G1 14 FHD 4650U 8GB 256SSD EN W10Pro at ~700$ locally, it's a bit less in memory to run dual boot. So there should be really good reaso

I found the ThinkPad L14 G1 14 FHD 4650U 8GB 256SSD EN W10Pro at ~700$ locally, it's a bit less in memory to run dual boot. So there should be really good reasons to abandon soldered RAM in E14. I asked a person from a PC repair shop, whether he potentially could perform the same on system board, as this guy on DEll XPS from the link above. And he told, that theoretically it is possible to rewire the resistors on board so that BIOS won't detect soldered RAM and use only the insertable RAM, but there's the risk of overheating of the board and making the laptop not operational. Though I can't see enough logic here for board overheating, if you leave the soldered RAM in the board and only resolder the Serial Prescence Detect module resistors in specific points on board. The board could overheat if you resolder the RAMs themsleves and not the small resistors.