Yay for Arkansas! Nice to see 75 creeping further east.
Michigan and Maine currently have 75 mph posted on rural interstate highways.
West Virginia recently was permitted to post 75 mph on rural interstate highways, though currently has not done any IIRC.
North Carolina Senate passed a bill back in 2013 to authorize 75 mph speed limits on rural interstate highways, though it never passed the House.
Mississippi and a few other states I believe have also attempted it, but never passed.
I think it would be worthwhile to bring them back up in the future to see if it can pass again. Different people in office, perhaps maybe a chance. They need to try annually, not just once and give up. I'd also like to see states such as South Carolina, North Carolina, Virginia, Maryland, and northeastern states increase the maximum speed limit permitted on non-limited-access divided highways to 65-70 mph, and 60-65 mph on two-lane roads.
A fix for Virginia's infamous 80 mph reckless driving limit for 70 mph zones failed for many years, yet they kept pushing it through, and finally this year it actually passed and was signed by Governor Northam, and beginning July 1, the reckless driving threshold will increase to 85 mph.