Well the ones you need to win over are the DMs and there’s not really any DM-side improvements as far as I’m aware, it’s basically just worth it if you like their setting.
I’ve seen plenty of situations where a DM wanted to run a different system but the players thought that sounded too hard and they only want to play what they know. In my experience, it’s usually the players you need to convince. The DM is the member of the friend group who is the most open to putting in effort to begin with. The players are the lazy ones and therefore the most resistant to change.
True, but you need someone to buy in first and there’s no real reason for the DM to buy-in outside of the setting. If the DM doesn’t buy in you don’t even get to the stage of pitching it to the players.
That said it is an easy pitch to the players since you can straight convert characters across.