Gun hunters are transitioning away to crossguns anyway, for more of the rut and much longer season.  It went on for 10 years + here in Indiana.  I have 5 guns, but am not a gun guy.  I rarely touch them.  98% archery.  I drew Illinois full firearm season public tags the last 5 years, and never used any of them.  I'm too tired after 8 weeks of hardcore archery hunting.  And last year I had already filled both my archery tags.  There are so many xgunners on public these days I had to quit hunting from walk in areas and go strictly with boat access spots only.
I actually bought a new Savage 20 guage bolt action slug gun 6 years ago, which I still have never hunted with!  Top notch scope too!  I don't know how much the demand for that gun will be reduced by this legislation.  I don't know how much benefit these rifle restricted calibers have over my quality slugger.  Something to study.  But my only rifle is a Remington .300 Win Mag for elk and stuff, which I rarely use, and which I doubt will ever be legal in Illinois.  So I expect I'll keep my Savage.