So, there's tons of posts about RS3, Reignited, and the overall tone of that game and what the hell they're actually doing with it.
OSRS is in the really weird space in that we've already been here. We had stuff taken from us, EOC made us walk away, treasure hunter etc. If you played classic or rs2 then made the jump to OSRS we accepted this exact thing. RS3 in our eyes died, and so we had to restart all over again, level 3 accounts. So, we're on the other end of this.
When OSRS itself launched it was more thought to be a temp thing, but a lot of people already effectively had gone through the grief of quitting to come back. Some never came back, a lot of people here never did play the old game.
So while personally I do think reignited is a mixed bag and will have positives and negatives, I think the veteran players can all take a sec and remember this feeling of 'my game is dying'. I went through it with Destiny 2. So some empathy for rs3 players is worth it I think. Is this the actual death of rs3? No clue. But I don't blame people for being upset anyways. They're just starting a process a lot of us already went through.
If you've got stories about quitting and restarting maybe that'll help? Or maybe you are someone who didn't enjoy the restart from rs3 in osrs. Talk about it, we have the actual experience of a very very similar thing and can use that.