When do you actually decide it's time to switch apps?

I have a bad habit of trying new tools even when the one I'm using is perfectly fine.

I'll see something new, think it looks better, move everything over, spend time learning it... and then end up back on the old app a couple of weeks later.

But then there are other apps I've complained about forever without replacing because switching feels like too much work.

So what's the thing that finally makes you switch?

A missing feature? Price? Performance? Just getting annoyed with the UI one too many times?

Do you have an actual rule for this, or do you just know when you've had enough?