I see this problem is really much simpler, for me in any field there will be new products created and if not competitive enough, old products will be left behind. And in the crypto market, this is very evident with the things that OP stated, if they do well, there will be no reason for the project to die.
yes you're right, so all that was replaced from the development of that project. so if they continue to develop their platform and provide new innovations, I'm sure even if the coin is old, it's still worth investing in.
even tokens from old projects that used to be very cheap and not many pay attention to can also get their glory in the future.
I see that there are projects such as BITSONG and Adbank that have been running for a very long time for platform development. even their tokens used to have no value or just a very cheap value.
but after 2 years of development, the team proved that the ecosystem they built was finally accepted by the market. and that makes whoever sticks with a good project will definitely benefit.
old assets are not only top market assets that must be considered. This market is too broad, and there are many assets that we can learn from.