There an interesting series on the modernization of diablo[0] that dives deep into the game mechanics that makes d1 and d2 "better" games than d3 and d4. Basically it all comes down to creating tension, power variable spikes, and meaningful itemization.

https://youtu.be/bcdHPZzyCxQ?si=a8_mDLFTcMrKFV_s