What constitutes being "old school" in the military?

What's old school? I donno. I enlisted in July 1968 & retired in July 1988. 35 years retired.
There were WW2 vets still on active duty back then ... they were old school.

Old school. are steel pots, shelter halves, powdered eggs for breakfast, the dark brown MREs, Brasso for all of your brass, spit-shined boots and low quarters, BDUs with starch so heavy the uniform could stand on its own, Payday activities in Class-A or B uniform, the old gray PFU from the '80s, getting smoked or smoking a soldier without being reprimanded, the brass buckle web belt with the LBE, military decals on your POV which allowed you to go through the gate without stopping to show ID, Kit Carson Week at Ft. Carson and All American Week at Ft. Bragg, KP duty, Duece 1/2, 5-ton, Cutvee, cattle trucks, the lime green pickup trucks used by supply, Glider caps for the Class-A uniform, freedom of speech during cadences without fear of reprimand, running until the platoon sergeant, First Sergeant, or Battalion/Brigade Commander got tired, CSM performing and sometimes instructing PT sessions with the troops, wall-to-wall counseling, which I found to be more effective than Article 15s, standards of performance and discipline was top notch, (it wasn't uncommon for me to see PFCs and below standing at parade rest for when speaking to a Specialist), and who can forget the Lister bags filled with ice and water and hung up for troops to fill their canteens during the summer months of field training. Don't get me started on camo nets, the old army sleeping bag with straps to hold it on your ALICE pack/rucksack, old typewriters for NCOER/OER reports, white-out to correct mistakes on reports, utilizing maps for all movement driving and on foot, (GPS wasn't a thing when I was coming up the ranks), and finally using 550 cord and ponchos as tents or cover in the place of shelter halves. This list goes on and on. Remember the potbelly stoves for heat? Man, I miss those days.

Bringing it home with you in civilian communities.

Bring it home with you in the community.

Trying cleaning your M! And eating sea rations from WW!!

Had a pair of Jungle Boots for the Toolies, and a Spit Shined pair for in Garrison.

"Old Corps" is anyone or anything in place the day before YOU joined, Boot!

Old school in the military is not having to put up with all of this woke bullshit. You didn't have to be careful which pronoun that you used. and in the infantry there were only men, no women, as it should be. The bad part is that affirmative action was practiced as it probably still is, unfair to all.

Well, for Navy, if you recall going to basic in Great Lakes in a barracks built in 1911 and instead of reveille waking you, in the moments before the trumpet blasted over the speakers you heard the angry buzz from the feedback in the ancient speaker wires strung from command to each barracks waking us and disturbing it's resident 3" brown German cockroaches that ate bug killer for breakfast and patrolled the barracks at night.

Definitely a moving target. Went through basic in 1960 at Ft. Leonard Wood, stayed in the same "temporary" wooden barracks that my father did 25+ years before. Trained on M-1 Garand, and later had an M1A1 carbine. My trainers were mostly "old school" WW2 vets. Called them Old School because they had BROWN shiney boots while we new guys had BLACK shineys boots. My father told me he was trained by Old School grunts, mostly from WW1. They had shoes and puttees. 30+ years after I went thru FTLW one of my jobs was prepping our DACs for deployment to Saudi. They sure complained about the "Old school 'Nam vets".... Wish I knew for sure who my Grandfather's Old School vets were, he was in the Spanish American War....