I must be the odd one out as I regularly get slowdowns on my N9. I go about 3 months before the twitter app and email are showing me "Application not responding" messages every few presses.

I presumed it was tracker database fragmentation as usually just deleting the twitter / mail dbs is enough but a reflash when I can be bothered works well too.

For me it's like this: GS3/4 damn fast cpu - my expectation for a fluent UI is very high (always disappointed), WP fast cpu - my expectations are really high (always disappointed because of long transition effects) Harmattan damn slow cpu - expectations pretty low (never disappoints. Best UI ever.)

You said that TRIM support was never finished on the N9.
Is there a way to enable TRIM or something equal (garbadge collection ...) to work against flash wear?

Regards,
Stefan

My experience so far is that after flashing, an N9 becomes smooth as butter, very responsive and quick. I am most of the time amazed by how snappy it is. But over time it slows down and sometimes feels sluggish up to the point of becoming unusable.
I am wondering whether that has anything to do with enabling developer mode and tweaking the device (which is part of the fun of the N9).

I've refreshed the phone again a couple of days ago, but have so far refrained from enabling developer mode and I have just installed apps that don't need any tweaking (e.g open mode, etc.). It still feels snappy. Anyone having same experiences?