Yes, indeed, if you're looking to scale up to handle high concurrent user loads, scaling out horizontally is your best bet. We've got a client right now serving 700+ connections at the moment, and they're on four separate NodeBB instances. It's probably too much for what they need, but it's always nice to have more capacity than needed in case of spikes, etc.
Improvement Test
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What? I cannot zoom in photo either open image in a new window on a mobile! -
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@Roderick-Vincent on desktop this is already a thing, don't know about mobile.