Consumer computer hardware evolves quickly: new models are replaced by even newer ones, but sometimes the design takes direction that some portion of users just cannot accept; models or entire products get discontinued; companies go out of business.
I sometimes wonder: what if someone designed a 'bespoke' modern replacement mainboard for this or that laptop or gadget?
How hard could it be?
I would like to know: what does it take, in terms of skill level (how skilled and how rare a person does it take), time (man-months?) and/or overall costs required to design, manufacture and install a proper replacement mainboard for an older, non-open-hardware laptop? Such as this one: 'T50' replacement motherboard for IBM ThinkPad T43 laptop.