My car just hit 200,000 kilometers and I want to keep it going

I looked at my odometer today and realized my car just crossed 200,000 kilometers. It's a reliable Japanese sedan that has been with me for years and I'm not ready to let it go. But I know high mileage cars need different attention than newer ones. I want to be smart about this and not just wait for things to break. I've been reading about long-term vehicle upkeep strategies for high mileage cars and learned that at this stage prevention is everything. One article explained that beyond regular oil changes, things like transmission fluid flushes and coolant system maintenance become critical for longevity. The guide also mentioned inspecting suspension components because bushings wear out over time. Anyone else here successfully kept a car running past 200,000 or even 300,000 kilometers? What made the biggest difference for you?