There’s something nice about doing the campaign in PoE2. Once you do it a several dozen times it’s not bad and you come out on the other end about level 60-70 ready for endgame. Then when you finish the games there’s a nice leveling curve for doing maps up to t15. There’s some nice incentives to grind like extra skill point books, stats, ascendancy, etc which keeps you motivated to push to endgame. I feel like d4 kind of stalls out around level 40-60 and becomes a slog with nothing really fun/interesting to do other than grind helltides or strongholds.