What Do You Think Of As "Modern TTRPG Mechanics"?

[aramis erak]

I must have been avant-garde then, because I gave each player a dieroll mulligan each session in my AD&D games in the 90's lol

I gave players 2d of rerolls in character gen in Traveller/MegaTraveller since the late 80's... some saved them for play. I didn't restock them...