I had a couple of 1:10 Tamiya RC cars in the '80s. I started with the Holiday Buggy and then moved on to the F150 Ranger. For the latter, I also had the wheels and VW Baja Bug body to make it into the Sand Scorcher. The Ranger and Bug bodies where quite hard plastic, but very detailed. Seeing the prices they go for now, I kinda wish I still had them! There is an original Kyosho Optima partially disassembled in a box at my parents; house, but it's been there for over 30 years and I can't remember what parts it needed.
There's a guy I watch on YouTube who does great videos of the Tamiya 1:14 trucks. It's amazing how technology has progressed to have models with multiple working lights and realistic sounds. I'd love one, but doubt my modeling skills after so many years, and I'd struggle to justify the expense. Also, it'd probably end up as a "shelf queen"!