This outcome is expected, this is what makes most altcoins dangerous for long term hold without looking back, they can change from a Chain to another, they can swap smart contract, they can do lots of other things and if you aren't following you will lose out, it's always good to stay active
It affected the users who want to hold for long term because even if the project still is alive in the market and the team is developing the project, some of the team set a schedule for migration and how who are not informed no longer could move their tokens to another chain.
when an investor is confident the team is highly qualified to build a project, they tend to hold the token hoping for big profit after years. but disappointed after just a year.