Stilton,
The airlines and regulators are still saying 'there is no evidence' - even after a High Court case and all of the overwhelming evidence - so it's not over yet!
It's called denial - a bit like the African river - The Nile.
As you so rightly say, all anybody wants are the known solutions of:
- Filtered bleed air - Just like cigarettes.
- Fit toxic air detectors - not aircrew's noses!
- Reformulate the oils - take out the nerve agents.
- Just in case?