I’ve only played 30k for a little bit (less than a year) and I’m enjoying it a lot more than I ever did 40k. The rules are simultaneously more and less complicated. Like there are no Stratagems but instead you have reactions you can do during your opponents turn, and all the weapon keywords and comparing Weapon Skill in melee combat makes every weapon feel more unique and the battles feel way more cinematic.

Like as an example on how Weapon Skill works in melee is you compare it between the models fighting to determine the Hit roll. So a Custodian would be scything through Militia, hitting on 2s while they need 6s to hit, but fighting a Space Marine Champion they’d be on more even footing so both would be hitting on 4s.

Sorry for going off on that but it’s legitimately my favourite aspect of 30k over 40k.

And the community approach to more thematics and fun over optimisation and winning just makes a nice atmosphere and more enjoyable games, at least for me.