I have been driving a long time.
This is my own experience...
Harder today:
Most routes go out with far more work than 30+ years ago, more packages, more stops, more hours, larger trucks.
Weight and size limits are higher today but the internet has created far more resi stops, which avg less pieces per stop and lighter pkgs.
Telematics keeps methods cheating to a minimum.
Start times are later which is physiologically defeating and more difficult to do the job in the dark.
Harder in the old days:
The job was more difficult mentally without EDD, i.e. memorizing stops, shipper numbers etc. in the old days.
The trucks had higher steps, manual steering.
No (then more limited) driver release. Find someone to sign and a lot of indirects.
Far more on-area observations and production rides. Supervisors for the most part were harder on drivers.
Oldupsman does have a point in letting them push you around. Many managers were really abusive in the old days. Don't let them under your skin. Most supervisors are really just temporary employees anyway these days.
All in all, if I worked as few hours as I did 30 years ago, the job would be easier today than back then.
But the long hours, higher stop counts, and late start times make the job overall more difficult today.
That's why the 9.5 list is so important. Stand up for yourself, don't let them get to you, and the job becomes enjoyable.