I am subscribed to both. I assume nmy feed will eventually have many communities so subscribing just to those 2 is a non-starter.

Yeah I could write my own client to be able to show just 2 communities, but I'd rather not have to go through all that trouble*.

^* I've been thinking about taking an open source reddit android app and adapting it to work with lemmy

The content on the lemmy.world NCD isn't shared in this NCD and vice versa, so even if I can subscribe to the other NCD from this account I can only view the post from both NCDs is to go to the Lemmy equivalent of my frontpage. But from there I see all of the posts from all of my subscriptions. Is there an equivalent of a multi-reddit? Where you can view a feed that combines two communities, but only those communities?

To help jump start NCD on Lemmy what do you think about a bot that cross[site]posts reddit NCD posts here. You could tune it to only copy posts that have been up for a few hours and meet minimum vote threshold. Or you could ask people here to submit their reddit usernames and then only auto-copy those users' posts here.

If Lemmy has the same content that reddit does then that will go a long way towards helping increase the user base and engagement.

2 of them are already mods at Lemmy.world

"There can only be one" isn't literal. Obviously there can be more than one otherwise why would I be asking which of 2 instances should we use.

But network effects will tend to grow one at the expense of the other and it's a feedback loop that will likely end up with one being dominant by far. I'm just speculating on which that will be.

Sometimes it is still stupid, but not always

Two of the reddit NCD mods are mods on the lemmy.world instance. None seem to be mods here. I guess that's why they're promoting that instance over this bigger (for now) one.