Picking up new hobbies, investing in them far beyond what would be considered a casual interest, then getting bored or disillusioned with the community after 6-24 months.
See
Foam dart blasters
yo yos
magic the gathering (This was like 15 years)
coin collecting
juggling
pocket knives
archery
running
Currently working on 3D printing, though that’s been more of a means to get back into foam blasters because it’s far cheaper to print your own blasters and mod parts.
Picking up new hobbies, investing in them far beyond what would be considered a casual interest, then getting bored or disillusioned with the community after 6-24 months.
See