We had a 1981 Dodge van with a 6. If you went up a hill manually, it’d downshift and do just fine, at least until you got to really high altitudes. If you went up a hill with cruise control, it wouldn’t give it any more throttle as the speed dropped.
I remember mom used to get furious about this because dad was of the mentality that if he has an automated system, he will by-God use it, so we would be going up fairly gentle (straight) grades on the interstate at 40mph-and-falling because he refused to take over manually.
That was also the van that freaked my grandpa out. Right after my folks bought it we went out across Texas to visit the grandparents. Mom was telling him about all the features on the van (and being the 80’s they were pretty much “it has air conditioning and shoulder belts”).
When she got to cruise control, Grandpa got very upset and told her to be sure to keep her hands on the wheel no matter what and “don’t be taking naps when the @#$@ thing’s moving.” He thought “cruise control” meant “autopilot.” He’d be apoplectic if you showed him a Tesla today.