I think we all were a bit careless with them at first.
You'll lose many people in migrating.
You could update your profile to point to your new npub as well as post a note about it. Many people won't notice & will only see it when they go looking for you.
I'd wear the risk that your nsec has compromised & not discuss anything too important in DMs.
All great points.
But the vane will arrive one day.
This is like bagging domain names in the late 90s.
I was thinking I would post on both for a while and set a date for this npub to retire. That way I could hopefully most people who want to stay connected can have plenty of opportunities to follow the new npub.
I'm putting a lot of effort into Nostr and it would suck to be forced to switch npubs suddenly because my keys were compromised.
Thinking about changing my nym too in order further separate from my Twitter identity. Right now everything is totally linked. Want to add an extra layer of obfuscation while I'm at it.
I'd note on the new npub and boost that note from the old npub.
That way you're reminding people & sharing the content.