I posted about taking my luggage because there's a small chance that I'd do that. I'm not stupid and would leave it behind in many cases.
If there's smoke in the cabin, no way am I standing up. Ditto if there if fire outside or pouring smoke. There wouldn't be too many cases where they inflate the slides but it's not too major. Some examples, include
Southwest Airlines 737 nose wheel collapses at LGA. Slides deployed. No fire or smoke. Why not save your luggage?
Southwest Airlines 737 overrun accident at BUR. Slides deployed. No fire or smoke.
On the other hand, I would run for my life when
Black smoke pouring out of an engine of a British Airways 777 at LAS.
Fuselage broken open and flames in the cabin of an Air France A340 after a rough landing and overrun of the runway at YYZ.
No airline wants to say it's ok to get luggage for legal reasons. I would err on the side of leaving luggage if not sure.