As a wildfowler, I do have loads that I would use on 'normal' game … with confidence.
I'm also fortunate enough to go on the odd shoot that have me reaching for much higher birds, and something like the Hull HPE 34g 4's.
Herein lies the two ends of the debate that haven't been covered by steel yet ….
At one end those with 2 1/2 game guns who have concerns on availability (which should be easily sorted in the next 4 years), and at the other end, those fortunate few who pump a huge amount into the 'system' on high and very high bird shoots … normal game steel loads will not create the kills are being made now.
There are Ioads that from performance on the shore 'would' drop a 65 yard pheasant, but they wouldn't go through my game gun.
The other option for the well funded is to have other non-tox loaded …. given some of their annual spends the %age increment wouldn't be too bad.