What I mean is-

• You probably have a dead, chonky Thinkpad
• You use a pre-built x86_64/Arm/RISC-V SBC, or design entirely new motherboard around the case
• Replace the ports with modern options
• Use modern Li-ion batteries
• Swap the display with newer matte IPS panels, or pOLED, etc

Any one who has worked on a project like this?