Did people here buy aircraft manufacturer / avionics manufacturer stock in the wake of the Covid crisis?

I started following the value investing sub recently, and I was just wondering for the people who were already here 5 years ago, what was the overall sentiment regarding aircraft manufacturer stocks like Airbus that tanked massively during Covid? Same question for avionics manufacturers like Safran.

Related to that, what was the sentiment regarding airlines stock?
On a side note, does someone know why stocks like United or Delta went up significantly over the last 3 years while AA never really recovered since COVID?

And lastly, did anyone have the bright idea of buying Embraer 3 to 5 years ago? If so, did the stock look like a value buy back then?