> buy the successor model from the same brand This might be the key issue. Let's say you bought a Roomba 10 years ago, and now go buy the successor model. Will

> buy the successor model from the same brand This might be the key issue. Let's say you bought a Roomba 10 years ago, and now go buy the successor model. Will it be any good ? probably not. At least not as good as the competition who got better than iRobot. It will be the same for cars. If you bought a Nissan 10 years ago, I wouldn't be surprised if the successor isn't as good. Same for cameras, computers, bikes etc. More than ever blind brand loyalty isn't paying off and even with brands staying at the top of their game the "successor" or best buying strategy might not be obvious. Some see the world as having become more complex, I'd argue having stagnating signals was worse.