Pretty sure PS+ isn't required for HD2
I tried to play it and could not back out of the PlayStation Plus screen to get into the game. So after 10 minutes trying and quitting/restarting the game, I said screw it, if I already paid $40, what's another $10?
why not play with randos, the game is not that good solo
Simply prefer to play at my own pace. I enjoyed the game solo. I loved The Division 1/2 and Outriders. Granted, Helldivers 2 is definitely more focused towards co-op than solo play but still, I enjoyed it for 6+ hours. Was close to level 6 character wise. I wouldn't have played it that long if I wasn't enjoying the game.