I think it should be fine after people get Legendaries, better conduits, world boss loot, mythic0/1/2 loot and people actually knowing the fights
However
I also believe that Normal should be easy in difficulty. A casual option for family and friends type of guilds were you just want to spend a good time.
I remember Naxx10 back in WotLK. We used to have a competitive raiding group and a FnF group. The second had 3 members of a family, the mother wasn't really that good and she usually underperformed. But it was always really fun. Just chatting in vent, talking about life, learning new fights, feeling like you achieved something big when you got your first epics and entry level loot. It was a really wholesome activity to do. I used to play in both groups, pushed Ulduar Hard Modes on main and FnF group on alts.
So I do think there's a space for normal. Some people don't want to wipe 1000 times, farm consumables, min-max your character, read icy veins guides of your class. There's a group of people out there that just want to share quality time with their guild/friends.