Let me ask you a question. What do you think would prevent you from keeping your hundred series on the road until you die? I’m planning to keep mine unless I somehow come in to more money where I can buy a 200 for cash. I will rebuild the engine when I need to. I will rebuild the transmission when it needs to, and I will fix things that go wrong. What would prevent me from doing that? What would prevent you?
Plastic wears out after enough heat/cooling cycles. There may be less plastic on 100 series but there are enough connectors, brackets, sensors etc in there to make it a serious pain in the ass to deal with them once they start going south.
It won’t be the drive train or lack of tech that eventually drives me to sell my 100. It is going to be the pain in the ass of replacing one of the above mentioned parts every three months. Toyota makes better parts than most but they’re not immune to science.