I think the concern is more

• LW works great, and it has most of the communities so most new people join there
• LW starts running Lemmy + some extra features on top
• time passes
• LW closes off, but it still has the mass of users and new features, and most people don’t care about what this might mean because it still “works great”. There’s not enough friction to jump instances
• it enshitifies, we’re back to June 2023