I decided to restore my 24 year old Merlin Extralight. In its current configuration it has a mishmash of Shimano 10 speed mechanical components.
A few years back, I added S&S couplers to make use of it as a travel bike. The rebuild will SRAM Force electric 12 speed. The wireless components should be really nice with only one brake cable to futz with in packing and unpacking the bike.
So far I’ve removed the old components and cleaned up the frame. After 24 years use, guesstimated 50,000 miles, a hundred or so crits, a few crashes, and schlepped around the US and Europe in an S&S travel case, it still looks close to new.