Mr.Acorn Cannon, how are you?

It would take a lot of time and effort to develop something new now, so I think it's fine to release limited equipment in its current state.
With that in mind, it would be better for future limited equipment to be time-limited rather than number-limited.
For example, there are several ways to do this, such as limiting it to a 100-period period starting from the "5200th term."