You're actually right on this one. Many altcoins have been outdated but yet they're still part of the top ranks. It will only be a matter of time until most of them get eliminated there and become a forgotten coin. To me, it's not about being updated or outdated on this market with their blockchain or what does the developer does. What matters to why they're retaining their position is because there's a strong sense of support that's coming from their community. That's why if it were not for the community, many of these altcoins have been dead long time ago already. But then, they're still alive and kicking and so they're staying to their current positions but just like in the past, many of them have became once a popular coin but now forgotten.